Funny Birthday Shirts

Unethical Threads presents our funny birthday shirts collection - where offensive meets fashionable. Each design delivers laughs and premium comfort. Shop funny birthday shirts today - sizes S-4XL, 30-day satisfaction guarantee.

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About Our Funny Birthday Shirts Collection

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Related Collections: Complete Funny Shirts Collection | Funny Men'S Birthday Shirts | Mens Funny Birthday Shirts

  • Retro-style text graphic that reads “Legalize Cocaine ’25” in bold blue and red lettering, designed as a parody campaign slogan. The image evokes chaotic Gen Z humor, ideal for meme lovers, partygoers, and fans of ironic fashion. Retro-style text graphic that reads “Legalize Cocaine ’25” in bold blue and red lettering, designed as a parody campaign slogan. The image evokes chaotic Gen Z humor, ideal for meme lovers, partygoers, and fans of ironic fashion. Retro-style text graphic that reads “Legalize Cocaine ’25” in bold blue and red lettering, designed as a parody campaign slogan. The image evokes chaotic Gen Z humor, ideal for meme lovers, partygoers, and fans of ironic fashion. Retro-style text graphic that reads “Legalize Cocaine ’25” in bold blue and red lettering, designed as a parody campaign slogan. The image evokes chaotic Gen Z humor, ideal for meme lovers, partygoers, and fans of ironic fashion. Retro-style text graphic that reads “Legalize Cocaine ’25” in bold blue and red lettering, designed as a parody campaign slogan. The image evokes chaotic Gen Z humor, ideal for meme lovers, partygoers, and fans of ironic fashion. Retro-style text graphic that reads “Legalize Cocaine ’25” in bold blue and red lettering, designed as a parody campaign slogan. The image evokes chaotic Gen Z humor, ideal for meme lovers, partygoers, and fans of ironic fashion. Retro-style text graphic that reads “Legalize Cocaine ’25” in bold blue and red lettering, designed as a parody campaign slogan. The image evokes chaotic Gen Z humor, ideal for meme lovers, partygoers, and fans of ironic fashion. Retro-style text graphic that reads “Legalize Cocaine ’25” in bold blue and red lettering, designed as a parody campaign slogan. The image evokes chaotic Gen Z humor, ideal for meme lovers, partygoers, and fans of ironic fashion. Retro-style text graphic that reads “Legalize Cocaine ’25” in bold blue and red lettering, designed as a parody campaign slogan. The image evokes chaotic Gen Z humor, ideal for meme lovers, partygoers, and fans of ironic fashion. Retro-style text graphic that reads “Legalize Cocaine ’25” in bold blue and red lettering, designed as a parody campaign slogan. The image evokes chaotic Gen Z humor, ideal for meme lovers, partygoers, and fans of ironic fashion. Retro-style text graphic that reads “Legalize Cocaine ’25” in bold blue and red lettering, designed as a parody campaign slogan. The image evokes chaotic Gen Z humor, ideal for meme lovers, partygoers, and fans of ironic fashion. Retro-style text graphic that reads “Legalize Cocaine ’25” in bold blue and red lettering, designed as a parody campaign slogan. The image evokes chaotic Gen Z humor, ideal for meme lovers, partygoers, and fans of ironic fashion. Retro-style text graphic that reads “Legalize Cocaine ’25” in bold blue and red lettering, designed as a parody campaign slogan. The image evokes chaotic Gen Z humor, ideal for meme lovers, partygoers, and fans of ironic fashion. Retro-style text graphic that reads “Legalize Cocaine ’25” in bold blue and red lettering, designed as a parody campaign slogan. The image evokes chaotic Gen Z humor, ideal for meme lovers, partygoers, and fans of ironic fashion.

    Legalize Cocaine 25' Tee

    Legalize Cocaine 25' Tee

    From $24.99 USD
    From $24.99 USD
    Color
    Size
  • Funny fishing pun black shirt that says "Master Baiter" with playful graphic, perfect for outdoorsmen, dirty joke lovers, and gag gift ideas. Funny fishing pun black shirt that says "Master Baiter" with playful graphic, perfect for outdoorsmen, dirty joke lovers, and gag gift ideas. Funny fishing pun black shirt that says "Master Baiter" with playful graphic, perfect for outdoorsmen, dirty joke lovers, and gag gift ideas. Funny fishing pun black shirt that says "Master Baiter" with playful graphic, perfect for outdoorsmen, dirty joke lovers, and gag gift ideas. Funny fishing pun black shirt that says "Master Baiter" with playful graphic, perfect for outdoorsmen, dirty joke lovers, and gag gift ideas. Funny fishing pun black shirt that says "Master Baiter" with playful graphic, perfect for outdoorsmen, dirty joke lovers, and gag gift ideas. Funny fishing pun shirt that says "Master Baiter" with playful graphic, perfect for fisherman, dirty joke lovers, and gag gift ideas. Funny fishing pun shirt that says "Master Baiter" with playful graphic, perfect for fisherman, dirty joke lovers, and gag gift ideas. Funny fishing pun shirt that says "Master Baiter" with playful graphic, perfect for fisherman, dirty joke lovers, and gag gift ideas. Funny fishing pun shirt that says "Master Baiter" with playful graphic, perfect for fisherman, dirty joke lovers, and gag gift ideas. Funny fishing pun shirt that says "Master Baiter" with playful graphic, perfect for fisherman, dirty joke lovers, and gag gift ideas. Funny fishing pun shirt that says "Master Baiter" with playful graphic, perfect for fisherman, dirty joke lovers, and gag gift ideas. Funny fishing pun shirt that says "Master Baiter" with playful graphic, perfect for fisherman, dirty joke lovers, and gag gift ideas. Funny fishing pun black shirt that says "Master Baiter" with playful graphic, perfect for outdoorsmen, dirty joke lovers, and gag gift ideas.

    *NEW* Master Baiter Tee

    *NEW* Master Baiter Tee

    From $24.99 USD
    From $24.99 USD
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    Size
  • *NEW* Pope Leo XIV O Block Chicago Tee *NEW* Pope Leo XIV O Block Chicago Tee *NEW* Pope Leo XIV O Block Chicago Tee *NEW* Pope Leo XIV O Block Chicago Tee *NEW* Pope Leo XIV O Block Chicago Tee *NEW* Pope Leo XIV O Block Chicago Tee *NEW* Pope Leo XIV O Block Chicago Tee

    *NEW* Pope Leo XIV O Block Chicago Tee

    *NEW* Pope Leo XIV O Block Chicago Tee

    From $24.99 USD
    From $24.99 USD
    Color
    Size
  • The “Sorry I’m Late I Was Cranking My Hog” T-shirt is a wildly unhinged graphic tee featuring a leather-clad pig on a flaming motorcycle. With double entendre energy and cursed biker-core vibes, this funny shirt is perfect for Gen Z humor fans, meme lovers, and anyone who thrives on public concern and chaotic stares. The “Sorry I’m Late I Was Cranking My Hog” T-shirt is a wildly unhinged graphic tee featuring a leather-clad pig on a flaming motorcycle. With double entendre energy and cursed biker-core vibes, this funny shirt is perfect for Gen Z humor fans, meme lovers, and anyone who thrives on public concern and chaotic stares. The “Sorry I’m Late I Was Cranking My Hog” T-shirt is a wildly unhinged graphic tee featuring a leather-clad pig on a flaming motorcycle. With double entendre energy and cursed biker-core vibes, this funny shirt is perfect for Gen Z humor fans, meme lovers, and anyone who thrives on public concern and chaotic stares. The “Sorry I’m Late I Was Cranking My Hog” T-shirt is a wildly unhinged graphic tee featuring a leather-clad pig on a flaming motorcycle. With double entendre energy and cursed biker-core vibes, this funny shirt is perfect for Gen Z humor fans, meme lovers, and anyone who thrives on public concern and chaotic stares. The “Sorry I’m Late I Was Cranking My Hog” T-shirt is a wildly unhinged graphic tee featuring a leather-clad pig on a flaming motorcycle. With double entendre energy and cursed biker-core vibes, this funny shirt is perfect for Gen Z humor fans, meme lovers, and anyone who thrives on public concern and chaotic stares. The “Sorry I’m Late I Was Cranking My Hog” T-shirt is a wildly unhinged graphic tee featuring a leather-clad pig on a flaming motorcycle. With double entendre energy and cursed biker-core vibes, this funny shirt is perfect for Gen Z humor fans, meme lovers, and anyone who thrives on public concern and chaotic stares. The “Sorry I’m Late I Was Cranking My Hog” T-shirt is a wildly unhinged graphic tee featuring a leather-clad pig on a flaming motorcycle. With double entendre energy and cursed biker-core vibes, this funny shirt is perfect for Gen Z humor fans, meme lovers, and anyone who thrives on public concern and chaotic stares.

    Sorry I'm Late I Was Cranking My Hog Tee

    Sorry I'm Late I Was Cranking My Hog Tee

    From $24.99 USD
    From $24.99 USD
    Color
    Size
  • Funny adult humor shirt that says I Love To Finger Paint, perfect with the matching I'm Paint tee for inappropriate couples outfits. Funny adult humor shirt that says I Love To Finger Paint, perfect with the matching I'm Paint tee for inappropriate couples outfits. Funny adult humor shirt that says I Love To Finger Paint, perfect with the matching I'm Paint tee for inappropriate couples outfits. Funny adult humor shirt that says I Love To Finger Paint, perfect with the matching I'm Paint tee for inappropriate couples outfits. Funny adult humor shirt that says I Love To Finger Paint, perfect with the matching I'm Paint tee for inappropriate couples outfits. Funny adult humor shirt that says I Love To Finger Paint, perfect with the matching I'm Paint tee for inappropriate couples outfits. Funny adult humor shirt that says I Love To Finger Paint, perfect with the matching I'm Paint tee for inappropriate couples outfits. Funny adult humor shirt that says I Love To Finger Paint, perfect with the matching I'm Paint tee for inappropriate couples outfits. Funny adult humor shirt that says I Love To Finger Paint, perfect with the matching I'm Paint tee for inappropriate couples outfits. Funny adult humor shirt that says I Love To Finger Paint, perfect with the matching I'm Paint tee for inappropriate couples outfits. Funny adult humor shirt that says I Love To Finger Paint, perfect with the matching I'm Paint tee for inappropriate couples outfits. Funny adult humor shirt that says I Love To Finger Paint, perfect with the matching I'm Paint tee for inappropriate couples outfits. Funny adult humor shirt that says I Love To Finger Paint, perfect with the matching I'm Paint tee for inappropriate couples outfits. Funny adult humor shirt that says I Love To Finger Paint, perfect with the matching I'm Paint tee for inappropriate couples outfits.

    I Love To Finger Paint I'm Paint Tee

    I Love To Finger Paint I'm Paint Tee

    From $24.99 USD
    From $24.99 USD
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    Size
  • The shirt shows a graphic of Chewy The Raccoon, a raccoon that went viral on the news because it was smoking a meth pipe. The shirt shows a graphic of Chewy The Raccoon, a raccoon that went viral on the news because it was smoking a meth pipe. The shirt shows a graphic of Chewy The Raccoon, a raccoon that went viral on the news because it was smoking a meth pipe. The shirt shows a graphic of Chewy The Raccoon, a raccoon that went viral on the news because it was smoking a meth pipe. The shirt shows a graphic of Chewy The Raccoon, a raccoon that went viral on the news because it was smoking a meth pipe. The shirt shows a graphic of Chewy The Raccoon, a raccoon that went viral on the news because it was smoking a meth pipe. The shirt shows a graphic of Chewy The Raccoon, a raccoon that went viral on the news because it was smoking a meth pipe.

    *NEW* Chewy The Raccoon Tee

    *NEW* Chewy The Raccoon Tee

    From $24.99 USD
    From $24.99 USD
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    Size
  • A chaotic vintage-style graphic shows a man mid-dropkick toward a startled child, with bold text reading “I Would Dropkick A Child For A Marlboro,” capturing dark humor and nicotine-fueled desperation in an unhinged meme format. A chaotic vintage-style graphic shows a man mid-dropkick toward a startled child, with bold text reading “I Would Dropkick A Child For A Marlboro,” capturing dark humor and nicotine-fueled desperation in an unhinged meme format. A chaotic vintage-style graphic shows a man mid-dropkick toward a startled child, with bold text reading “I Would Dropkick A Child For A Marlboro,” capturing dark humor and nicotine-fueled desperation in an unhinged meme format. A chaotic vintage-style graphic shows a man mid-dropkick toward a startled child, with bold text reading “I Would Dropkick A Child For A Marlboro,” capturing dark humor and nicotine-fueled desperation in an unhinged meme format. A chaotic vintage-style graphic shows a man mid-dropkick toward a startled child, with bold text reading “I Would Dropkick A Child For A Marlboro,” capturing dark humor and nicotine-fueled desperation in an unhinged meme format. A chaotic vintage-style graphic shows a man mid-dropkick toward a startled child, with bold text reading “I Would Dropkick A Child For A Marlboro,” capturing dark humor and nicotine-fueled desperation in an unhinged meme format. A chaotic vintage-style graphic shows a man mid-dropkick toward a startled child, with bold text reading “I Would Dropkick A Child For A Marlboro,” capturing dark humor and nicotine-fueled desperation in an unhinged meme format.

    *NEW* I Would Dropkick A Child For A Cigarette Tee

    *NEW* I Would Dropkick A Child For A Cigarette Tee

    From $24.99 USD
    From $24.99 USD
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    Size
  • Graphic tee that reads “I Would Dropkick A Child For A Diet Coke” with bold, chaotic design. Funny soda humor shirt for Diet Coke lovers, caffeine addicts, and unhinged meme fans. Graphic tee that reads “I Would Dropkick A Child For A Diet Coke” with bold, chaotic design. Funny soda humor shirt for Diet Coke lovers, caffeine addicts, and unhinged meme fans. Graphic tee that reads “I Would Dropkick A Child For A Diet Coke” with bold, chaotic design. Funny soda humor shirt for Diet Coke lovers, caffeine addicts, and unhinged meme fans. Graphic tee that reads “I Would Dropkick A Child For A Diet Coke” with bold, chaotic design. Funny soda humor shirt for Diet Coke lovers, caffeine addicts, and unhinged meme fans. Graphic tee that reads “I Would Dropkick A Child For A Diet Coke” with bold, chaotic design. Funny soda humor shirt for Diet Coke lovers, caffeine addicts, and unhinged meme fans. Graphic tee that reads “I Would Dropkick A Child For A Diet Coke” with bold, chaotic design. Funny soda humor shirt for Diet Coke lovers, caffeine addicts, and unhinged meme fans. Graphic tee that reads “I Would Dropkick A Child For A Diet Coke” with bold, chaotic design. Funny soda humor shirt for Diet Coke lovers, caffeine addicts, and unhinged meme fans.

    *NEW* I Would Dropkick A Child For A Diet Coke Tee

    *NEW* I Would Dropkick A Child For A Diet Coke Tee

    From $24.99 USD
    From $24.99 USD
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    Size
  • Inappropriate funny mesh trucker hat with bold black text that says “Working Hard Hardly Working Hard While Working” — a hilarious hat for men who love innuendos, dirty humor, and wearing something outrageous to work or parties. Inappropriate funny mesh trucker hat with bold black text that says “Working Hard Hardly Working Hard While Working” — a hilarious hat for men who love innuendos, dirty humor, and wearing something outrageous to work or parties. Inappropriate funny mesh trucker hat with bold black text that says “Working Hard Hardly Working Hard While Working” — a hilarious hat for men who love innuendos, dirty humor, and wearing something outrageous to work or parties.

    Working Hard Hardly Working Hard While Working Hat

    Working Hard Hardly Working Hard While Working Hat

    $29.99 USD
    $29.99 USD
    Color
  • text reads “I’m Peace” in a clean, rounded font on a black shirt, designed as the matching pair to the cheeky “I Come In Peace” tee for couples with bold humor. text reads “I’m Peace” in a clean, rounded font on a black shirt, designed as the matching pair to the cheeky “I Come In Peace” tee for couples with bold humor. text reads “I’m Peace” in a clean, rounded font on a black shirt, designed as the matching pair to the cheeky “I Come In Peace” tee for couples with bold humor. text reads “I’m Peace” in a clean, rounded font on a black shirt, designed as the matching pair to the cheeky “I Come In Peace” tee for couples with bold humor. text reads “I’m Peace” in a clean, rounded font on a black shirt, designed as the matching pair to the cheeky “I Come In Peace” tee for couples with bold humor. text reads “I’m Peace” in a clean, rounded font on a black shirt, designed as the matching pair to the cheeky “I Come In Peace” tee for couples with bold humor. text reads “I’m Peace” in a clean, rounded font on a white shirt, designed as the matching pair to the cheeky “I Come In Peace” tee for couples with bold humor. text reads “I’m Peace” in a clean, rounded font on a white shirt, designed as the matching pair to the cheeky “I Come In Peace” tee for couples with bold humor. text reads “I’m Peace” in a clean, rounded font on a white shirt, designed as the matching pair to the cheeky “I Come In Peace” tee for couples with bold humor. text reads “I’m Peace” in a clean, rounded font on a white shirt, designed as the matching pair to the cheeky “I Come In Peace” tee for couples with bold humor. text reads “I’m Peace” in a clean, rounded font on a white shirt, designed as the matching pair to the cheeky “I Come In Peace” tee for couples with bold humor. text reads “I’m Peace” in a clean, rounded font on a white shirt, designed as the matching pair to the cheeky “I Come In Peace” tee for couples with bold humor. text reads “I’m Peace” in a clean, rounded font on a white shirt, designed as the matching pair to the cheeky “I Come In Peace” tee for couples with bold humor. text reads “I’m Peace” in a clean, rounded font on a black shirt, designed as the matching pair to the cheeky “I Come In Peace” tee for couples with bold humor.

    I'm Peace Tee

    I'm Peace Tee

    From $24.99 USD
    From $24.99 USD
    Color
    Size
  • Inappropriate funny mesh trucker hat for men with bold white text reading “Free Mustache Rides” on a red foam front and mesh back — hilarious headwear for parties, bar crawls, or anyone who loves funny hat sayings. Inappropriate funny mesh trucker hat for men with bold white text reading “Free Mustache Rides” on a black foam front and mesh back — hilarious headwear for parties, bar crawls, or anyone who loves funny hat sayings.

    Free Mustache Rides Hat

    Free Mustache Rides Hat

    $29.99 USD
    $29.99 USD
    Color
  • Funny werewolf-themed T-shirt design with bold text reading “If They Talk Behind Your Back FART,” featuring multiple illustrated wolves including one howling, one tipping a cowboy hat, and another staring out a window. The graphic combines surreal, edgy humor with fantasy art style, making it a perfect meme shirt for Gen Z fans of fart jokes and chaotic energy. Funny werewolf-themed T-shirt design with bold text reading “If They Talk Behind Your Back FART,” featuring multiple illustrated wolves including one howling, one tipping a cowboy hat, and another staring out a window. The graphic combines surreal, edgy humor with fantasy art style, making it a perfect meme shirt for Gen Z fans of fart jokes and chaotic energy. Funny werewolf-themed T-shirt design with bold text reading “If They Talk Behind Your Back FART,” featuring multiple illustrated wolves including one howling, one tipping a cowboy hat, and another staring out a window. The graphic combines surreal, edgy humor with fantasy art style, making it a perfect meme shirt for Gen Z fans of fart jokes and chaotic energy. Funny werewolf-themed T-shirt design with bold text reading “If They Talk Behind Your Back FART,” featuring multiple illustrated wolves including one howling, one tipping a cowboy hat, and another staring out a window. The graphic combines surreal, edgy humor with fantasy art style, making it a perfect meme shirt for Gen Z fans of fart jokes and chaotic energy. Funny werewolf-themed T-shirt design with bold text reading “If They Talk Behind Your Back FART,” featuring multiple illustrated wolves including one howling, one tipping a cowboy hat, and another staring out a window. The graphic combines surreal, edgy humor with fantasy art style, making it a perfect meme shirt for Gen Z fans of fart jokes and chaotic energy. Funny werewolf-themed T-shirt design with bold text reading “If They Talk Behind Your Back FART,” featuring multiple illustrated wolves including one howling, one tipping a cowboy hat, and another staring out a window. The graphic combines surreal, edgy humor with fantasy art style, making it a perfect meme shirt for Gen Z fans of fart jokes and chaotic energy. Funny werewolf-themed T-shirt design with bold text reading “If They Talk Behind Your Back FART,” featuring multiple illustrated wolves including one howling, one tipping a cowboy hat, and another staring out a window. The graphic combines surreal, edgy humor with fantasy art style, making it a perfect meme shirt for Gen Z fans of fart jokes and chaotic energy.

    If They Talk Behind Your Back Fart Tee

    If They Talk Behind Your Back Fart Tee

    From $24.99 USD
    From $24.99 USD
    Color
    Size
  • Funny Dr Pegger T-Shirt featuring soda humor humor and meme-inspired design, perfect for casual wear and humor lovers. Funny Dr Pegger T-Shirt featuring soda humor humor and meme-inspired design, perfect for casual wear and humor lovers. Funny Dr Pegger T-Shirt featuring soda humor humor and meme-inspired design, perfect for casual wear and humor lovers. Funny Dr Pegger T-Shirt featuring soda humor humor and meme-inspired design, perfect for casual wear and humor lovers. Funny Dr Pegger T-Shirt featuring soda humor humor and meme-inspired design, perfect for casual wear and humor lovers. Funny Dr Pegger T-Shirt featuring soda humor humor and meme-inspired design, perfect for casual wear and humor lovers. Funny Dr Pegger T-Shirt featuring soda humor and meme-inspired design, perfect for casual wear and humor lovers. Funny Dr Pegger T-Shirt featuring soda humor and meme-inspired design, perfect for casual wear and humor lovers. Funny Dr Pegger T-Shirt featuring soda humor and meme-inspired design, perfect for casual wear and humor lovers. Funny Dr Pegger T-Shirt featuring soda humor and meme-inspired design, perfect for casual wear and humor lovers. Funny Dr Pegger T-Shirt featuring soda humor and meme-inspired design, perfect for casual wear and humor lovers. Funny Dr Pegger T-Shirt featuring soda humor and meme-inspired design, perfect for casual wear and humor lovers. Funny Dr Pegger T-Shirt featuring soda humor and meme-inspired design, perfect for casual wear and humor lovers. Funny Dr Pegger T-Shirt featuring soda humor humor and meme-inspired design, perfect for casual wear and humor lovers.

    Dr Pegger Soda Parody Tee

    Dr Pegger Soda Parody Tee

    From $24.99 USD
    From $24.99 USD
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    Size
  • Funny Onlyfangs T-Shirt featuring adult humor and meme-inspired design, perfect for casual wear and humor lovers. Funny Onlyfangs T-Shirt featuring adult humor and meme-inspired design, perfect for casual wear and humor lovers. Funny Onlyfangs T-Shirt featuring adult humor and meme-inspired design, perfect for casual wear and humor lovers. Funny Onlyfangs T-Shirt featuring adult humor and meme-inspired design, perfect for casual wear and humor lovers. Funny Onlyfangs T-Shirt featuring adult humor and meme-inspired design, perfect for casual wear and humor lovers. Funny Onlyfangs T-Shirt featuring adult humor and meme-inspired design, perfect for casual wear and humor lovers. Funny Onlyfangs T-Shirt featuring adult humor and meme-inspired design, perfect for casual wear and humor lovers.

    Onlyfangs Halloween Parody Tee

    Onlyfangs Halloween Parody Tee

    From $24.99 USD
    From $24.99 USD
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    Size
  • Funny inappropriate trucker hat for men featuring the phrase “Good Bush Bad Bush” with a parody of George W. Bush — a crazy mesh-back hat for fans of political humor, bold hat sayings, and hilarious head-turning designs.

    Good Bush Bad Bush George W Bush Hat

    Good Bush Bad Bush George W Bush Hat

    $29.99 USD
    $29.99 USD