Funny Birthday Shirts For Adults

Shop Unethical Threads' funny birthday shirts for adults collection for designs that make people do a double-take. Our funny birthday shirts for adults bring the laughs without compromising on comfort or quality. Available in sizes S-4XL with hassle-free returns.

✓ Free Shipping On All Orders | ✓ 30-Day Guarantee | ✓ Sizes S-4XL

About Our Funny Birthday Shirts For Adults Collection

Premium Quality & Features

Perfect Occasions

Why Choose Unethical Threads

Frequently Asked Questions

Related Collections: Complete Funny Shirts Collection | Funny Birthday Shirts For Group | Funny Tee Shirts For Adults Cheap

  • A bold graphic T-shirt features the phrase “I Would Dropkick A Child For A Dr Pepper” in distressed lettering, with a dramatic illustration of a man dropkicking a child, capturing chaotic energy and unhinged humor for soda lovers who embrace morally questionable loyalty. A bold graphic T-shirt features the phrase “I Would Dropkick A Child For A Dr Pepper” in distressed lettering, with a dramatic illustration of a man dropkicking a child, capturing chaotic energy and unhinged humor for soda lovers who embrace morally questionable loyalty. A bold graphic T-shirt features the phrase “I Would Dropkick A Child For A Dr Pepper” in distressed lettering, with a dramatic illustration of a man dropkicking a child, capturing chaotic energy and unhinged humor for soda lovers who embrace morally questionable loyalty. A bold graphic T-shirt features the phrase “I Would Dropkick A Child For A Dr Pepper” in distressed lettering, with a dramatic illustration of a man dropkicking a child, capturing chaotic energy and unhinged humor for soda lovers who embrace morally questionable loyalty. A bold graphic T-shirt features the phrase “I Would Dropkick A Child For A Dr Pepper” in distressed lettering, with a dramatic illustration of a man dropkicking a child, capturing chaotic energy and unhinged humor for soda lovers who embrace morally questionable loyalty. A bold graphic T-shirt features the phrase “I Would Dropkick A Child For A Dr Pepper” in distressed lettering, with a dramatic illustration of a man dropkicking a child, capturing chaotic energy and unhinged humor for soda lovers who embrace morally questionable loyalty. A bold graphic T-shirt features the phrase “I Would Dropkick A Child For A Dr Pepper” in distressed lettering, with a dramatic illustration of a man dropkicking a child, capturing chaotic energy and unhinged humor for soda lovers who embrace morally questionable loyalty.

    I Would Dropkick A Child For A Dr Pepper Graphic Tee

    I Would Dropkick A Child For A Dr Pepper Graphic Tee

    $24.99 USD
    $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
  • 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
  • A cursed twist on the “100 Men vs. 1 Gorilla” meme — this unhinged tee boldly declares your ability to beat off the competition... literally. Wildly inappropriate and destined to go viral, it’s the perfect shirt for anyone who thrives on chaos and shock value. A cursed twist on the “100 Men vs. 1 Gorilla” meme — this unhinged tee boldly declares your ability to beat off the competition... literally. Wildly inappropriate and destined to go viral, it’s the perfect shirt for anyone who thrives on chaos and shock value. A cursed twist on the “100 Men vs. 1 Gorilla” meme — this unhinged tee boldly declares your ability to beat off the competition... literally. Wildly inappropriate and destined to go viral, it’s the perfect shirt for anyone who thrives on chaos and shock value. A cursed twist on the “100 Men vs. 1 Gorilla” meme — this unhinged tee boldly declares your ability to beat off the competition... literally. Wildly inappropriate and destined to go viral, it’s the perfect shirt for anyone who thrives on chaos and shock value. A cursed twist on the “100 Men vs. 1 Gorilla” meme — this unhinged tee boldly declares your ability to beat off the competition... literally. Wildly inappropriate and destined to go viral, it’s the perfect shirt for anyone who thrives on chaos and shock value. A cursed twist on the “100 Men vs. 1 Gorilla” meme — this unhinged tee boldly declares your ability to beat off the competition... literally. Wildly inappropriate and destined to go viral, it’s the perfect shirt for anyone who thrives on chaos and shock value. A cursed twist on the “100 Men vs. 1 Gorilla” meme — this unhinged tee boldly declares your ability to beat off the competition... literally. Wildly inappropriate and destined to go viral, it’s the perfect shirt for anyone who thrives on chaos and shock value.

    *NEW* I'm Not A Gorilla But I Can Beat Off 100 Men Tee

    *NEW* I'm Not A Gorilla But I Can Beat Off 100 Men Tee

    From $24.99 USD
    From $24.99 USD
    Color
    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
    Color
    Size
  • Light blue text reads “I’m Bubbles” in a bubbly, rounded font on a white shirt, designed to pair with the “I Blow Bubbles” tee for a bold and inappropriate couples outfit. Light blue text reads “I’m Bubbles” in a bubbly, rounded font on a white shirt, designed to pair with the “I Blow Bubbles” tee for a bold and inappropriate couples outfit. Light blue text reads “I’m Bubbles” in a bubbly, rounded font on a white shirt, designed to pair with the “I Blow Bubbles” tee for a bold and inappropriate couples outfit. Light blue text reads “I’m Bubbles” in a bubbly, rounded font on a white shirt, designed to pair with the “I Blow Bubbles” tee for a bold and inappropriate couples outfit. Light blue text reads “I’m Bubbles” in a bubbly, rounded font on a white shirt, designed to pair with the “I Blow Bubbles” tee for a bold and inappropriate couples outfit. Light blue text reads “I’m Bubbles” in a bubbly, rounded font on a white shirt, designed to pair with the “I Blow Bubbles” tee for a bold and inappropriate couples outfit. Light blue text reads “I’m Bubbles” in a bubbly, rounded font on a black shirt, designed to pair with the “I Blow Bubbles” tee for a bold and inappropriate couples outfit. Light blue text reads “I’m Bubbles” in a bubbly, rounded font on a black shirt, designed to pair with the “I Blow Bubbles” tee for a bold and inappropriate couples outfit. Light blue text reads “I’m Bubbles” in a bubbly, rounded font on a black shirt, designed to pair with the “I Blow Bubbles” tee for a bold and inappropriate couples outfit. Light blue text reads “I’m Bubbles” in a bubbly, rounded font on a black shirt, designed to pair with the “I Blow Bubbles” tee for a bold and inappropriate couples outfit. Light blue text reads “I’m Bubbles” in a bubbly, rounded font on a black shirt, designed to pair with the “I Blow Bubbles” tee for a bold and inappropriate couples outfit. Light blue text reads “I’m Bubbles” in a bubbly, rounded font on a black shirt, designed to pair with the “I Blow Bubbles” tee for a bold and inappropriate couples outfit. Light blue text reads “I’m Bubbles” in a bubbly, rounded font on a black shirt, designed to pair with the “I Blow Bubbles” tee for a bold and inappropriate couples outfit. Light blue text reads “I’m Bubbles” in a bubbly, rounded font on a white shirt, designed to pair with the “I Blow Bubbles” tee for a bold and inappropriate couples outfit.

    I'm Bubbles Tee

    I'm Bubbles Tee

    From $24.99 USD
    From $24.99 USD
    Color
    Size
  • 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 drinking trucker hat with bold white text that says “I Was Sober For 11 Years Then I Turned 12” — a hilarious mesh-back hat for men who love beer hats, inappropriate jokes, and crazy humor at parties or tailgates. Funny drinking trucker hat with bold white text that says “I Was Sober For 11 Years Then I Turned 12” — a hilarious mesh-back hat for men who love beer hats, inappropriate jokes, and crazy humor at parties or tailgates. Funny drinking trucker hat with bold white text that says “I Was Sober For 11 Years Then I Turned 12” — a hilarious mesh-back hat for men who love beer hats, inappropriate jokes, and crazy humor at parties or tailgates.

    I Was Sober For 11 Years Then I Turned 12 Hat

    I Was Sober For 11 Years Then I Turned 12 Hat

    $29.99 USD
    $29.99 USD
    Color
  • Alt text: Meme-style graphic of a wooden humanoid character with exaggerated eyes holding a bat, surrounded by lightning and ghostly duplicates, with bold marquee text reading “TUNG TUNG” at the top and “TUNG SAHUR” at the bottom—radiating chaotic Gen Z, sahur-core energy. Alt text: Meme-style graphic of a wooden humanoid character with exaggerated eyes holding a bat, surrounded by lightning and ghostly duplicates, with bold marquee text reading “TUNG TUNG” at the top and “TUNG SAHUR” at the bottom—radiating chaotic Gen Z, sahur-core energy. Alt text: Meme-style graphic of a wooden humanoid character with exaggerated eyes holding a bat, surrounded by lightning and ghostly duplicates, with bold marquee text reading “TUNG TUNG” at the top and “TUNG SAHUR” at the bottom—radiating chaotic Gen Z, sahur-core energy. Alt text: Meme-style graphic of a wooden humanoid character with exaggerated eyes holding a bat, surrounded by lightning and ghostly duplicates, with bold marquee text reading “TUNG TUNG” at the top and “TUNG SAHUR” at the bottom—radiating chaotic Gen Z, sahur-core energy. Alt text: Meme-style graphic of a wooden humanoid character with exaggerated eyes holding a bat, surrounded by lightning and ghostly duplicates, with bold marquee text reading “TUNG TUNG” at the top and “TUNG SAHUR” at the bottom—radiating chaotic Gen Z, sahur-core energy. Alt text: Meme-style graphic of a wooden humanoid character with exaggerated eyes holding a bat, surrounded by lightning and ghostly duplicates, with bold marquee text reading “TUNG TUNG” at the top and “TUNG SAHUR” at the bottom—radiating chaotic Gen Z, sahur-core energy. Alt text: Meme-style graphic of a wooden humanoid character with exaggerated eyes holding a bat, surrounded by lightning and ghostly duplicates, with bold marquee text reading “TUNG TUNG” at the top and “TUNG SAHUR” at the bottom—radiating chaotic Gen Z, sahur-core energy.

    Tung Tung Tung Sahur Italian Brainrot Tee

    Tung Tung Tung Sahur Italian Brainrot Tee

    From $24.99 USD
    From $24.99 USD
    Color
    Size
  • Crazy funny trucker hat for men with bold parody text styled like a soda logo that says “Diet Cunt” — an inappropriate mesh-back hat for fans of offensive humor, hilarious hat sayings, and unhinged party energy. Crazy funny trucker hat for men with bold parody text styled like a soda logo that says “Diet Cunt” — an inappropriate mesh-back hat for fans of offensive humor, hilarious hat sayings, and unhinged party energy. Crazy funny trucker hat for men with bold parody text styled like a soda logo that says “Diet Cunt” — an inappropriate mesh-back hat for fans of offensive humor, hilarious hat sayings, and unhinged party energy.

    Diet Cunt Hat

    Diet Cunt Hat

    $29.99 USD
    $29.99 USD
    Color
  • Graphic T-shirt design of a Tesla dealership in flames with Cybertrucks out front and the phrase “Rome Wasn’t Burned In A Day,” symbolizing tech collapse and satire. Graphic T-shirt design of a Tesla dealership in flames with Cybertrucks out front and the phrase “Rome Wasn’t Burned In A Day,” symbolizing tech collapse and satire. Graphic T-shirt design of a Tesla dealership in flames with Cybertrucks out front and the phrase “Rome Wasn’t Burned In A Day,” symbolizing tech collapse and satire. Graphic T-shirt design of a Tesla dealership in flames with Cybertrucks out front and the phrase “Rome Wasn’t Burned In A Day,” symbolizing tech collapse and satire. Graphic T-shirt design of a Tesla dealership in flames with Cybertrucks out front and the phrase “Rome Wasn’t Burned In A Day,” symbolizing tech collapse and satire. Graphic T-shirt design of a Tesla dealership in flames with Cybertrucks out front and the phrase “Rome Wasn’t Burned In A Day,” symbolizing tech collapse and satire. Graphic T-shirt design of a Tesla dealership in flames with Cybertrucks out front and the phrase “Rome Wasn’t Burned In A Day,” symbolizing tech collapse and satire.

    *NEW* Rome Wasn't Burned In A Day Tesla Tee

    *NEW* Rome Wasn't Burned In A Day Tesla Tee

    From $24.99 USD
    From $24.99 USD
    Color
    Size
  • Bold black funny mesh trucker hat with black text that says “Spitters Are Quitters” — an inappropriate drinking hat for men with dirty humor, hilarious party vibes, and top-tier funny hat sayings. Bold white funny mesh trucker hat with black text that says “Spitters Are Quitters” — an inappropriate drinking hat for men with dirty humor, hilarious party vibes, and top-tier funny hat sayings. Bold white/blue/red funny mesh trucker hat with black text that says “Spitters Are Quitters” — an inappropriate drinking hat for men with dirty humor, hilarious party vibes, and top-tier funny hat sayings.

    Spitters Are Quitters Hat

    Spitters Are Quitters Hat

    $29.99 USD
    $29.99 USD
    Color