Funny 40Th Birthday Shirts

Explore our funny 40th birthday shirts collection at Unethical Threads where inappropriate meets impeccable quality. These funny 40th birthday shirts are crafted for those who appreciate humor that pushes boundaries. Sizes S-4XL, free shipping on all orders.

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About Our Funny 40Th Birthday Shirts Collection

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Related Collections: Complete Funny Shirts Collection | Funny Birthday Shirts | Funny 50Th Birthday Shirts

  • The "I Would Dropkick A Child For A Costco Hotdog T Shirt" blends dark humor with absurdity, capturing the chaotic, unhinged vibe of modern meme culture. Ideal for those who appreciate shock value and want a shirt that's guaranteed to get double-takes. The "I Would Dropkick A Child For A Costco Hotdog T Shirt" blends dark humor with absurdity, capturing the chaotic, unhinged vibe of modern meme culture. Ideal for those who appreciate shock value and want a shirt that's guaranteed to get double-takes. The "I Would Dropkick A Child For A Costco Hotdog T Shirt" blends dark humor with absurdity, capturing the chaotic, unhinged vibe of modern meme culture. Ideal for those who appreciate shock value and want a shirt that's guaranteed to get double-takes. The "I Would Dropkick A Child For A Costco Hotdog T Shirt" blends dark humor with absurdity, capturing the chaotic, unhinged vibe of modern meme culture. Ideal for those who appreciate shock value and want a shirt that's guaranteed to get double-takes. The "I Would Dropkick A Child For A Costco Hotdog T Shirt" blends dark humor with absurdity, capturing the chaotic, unhinged vibe of modern meme culture. Ideal for those who appreciate shock value and want a shirt that's guaranteed to get double-takes. The "I Would Dropkick A Child For A Costco Hotdog T Shirt" blends dark humor with absurdity, capturing the chaotic, unhinged vibe of modern meme culture. Ideal for those who appreciate shock value and want a shirt that's guaranteed to get double-takes. The "I Would Dropkick A Child For A Costco Hotdog T Shirt" blends dark humor with absurdity, capturing the chaotic, unhinged vibe of modern meme culture. Ideal for those who appreciate shock value and want a shirt that's guaranteed to get double-takes.

    *NEW* I Would Dropkick A Child For A Costco Hotdog Tee

    *NEW* I Would Dropkick A Child For A Costco Hotdog Tee

    From $24.99 USD
    From $24.99 USD
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  • Sepia-toned graphic of Jesus stepping out of a tomb with arms outstretched, paired with the phrase "Coming Out Of My Cave And I’ve Been Doing Just Fine" in bold vintage-style text, referencing Mr. Brightside lyrics in a humorous biblical mashup. Sepia-toned graphic of Jesus stepping out of a tomb with arms outstretched, paired with the phrase "Coming Out Of My Cave And I’ve Been Doing Just Fine" in bold vintage-style text, referencing Mr. Brightside lyrics in a humorous biblical mashup. Sepia-toned graphic of Jesus stepping out of a tomb with arms outstretched, paired with the phrase "Coming Out Of My Cave And I’ve Been Doing Just Fine" in bold vintage-style text, referencing Mr. Brightside lyrics in a humorous biblical mashup. Sepia-toned graphic of Jesus stepping out of a tomb with arms outstretched, paired with the phrase "Coming Out Of My Cave And I’ve Been Doing Just Fine" in bold vintage-style text, referencing Mr. Brightside lyrics in a humorous biblical mashup. Sepia-toned graphic of Jesus stepping out of a tomb with arms outstretched, paired with the phrase "Coming Out Of My Cave And I’ve Been Doing Just Fine" in bold vintage-style text, referencing Mr. Brightside lyrics in a humorous biblical mashup. Sepia-toned graphic of Jesus stepping out of a tomb with arms outstretched, paired with the phrase "Coming Out Of My Cave And I’ve Been Doing Just Fine" in bold vintage-style text, referencing Mr. Brightside lyrics in a humorous biblical mashup. Sepia-toned graphic of Jesus stepping out of a tomb with arms outstretched, paired with the phrase "Coming Out Of My Cave And I’ve Been Doing Just Fine" in bold vintage-style text, referencing Mr. Brightside lyrics in a humorous biblical mashup.

    Coming Out Of My Cave - Lyrics Jesus Easter Tee

    Coming Out Of My Cave - Lyrics Jesus Easter Tee

    From $24.99 USD
    From $24.99 USD
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    Size
  • Funny Minions parody shirt that says “The Streets Turned Me Despicable But My Money Still Gru” with meme humor. Funny Minions parody shirt that says “The Streets Turned Me Despicable But My Money Still Gru” with meme humor. Funny Minions parody shirt that says “The Streets Turned Me Despicable But My Money Still Gru” with meme humor. Funny Minions parody shirt that says “The Streets Turned Me Despicable But My Money Still Gru” with meme humor. Funny Minions parody shirt that says “The Streets Turned Me Despicable But My Money Still Gru” with meme humor. Funny Minions parody shirt that says “The Streets Turned Me Despicable But My Money Still Gru” with meme humor. Funny Minions parody shirt that says “The Streets Turned Me Despicable But My Money Still Gru” with meme humor. Funny Minions parody shirt that says “The Streets Turned Me Despicable But My Money Still Gru” with meme humor. Funny Minions parody shirt that says “The Streets Turned Me Despicable But My Money Still Gru” with meme humor. Funny Minions parody shirt that says “The Streets Turned Me Despicable But My Money Still Gru” with meme humor. Funny Minions parody shirt that says “The Streets Turned Me Despicable But My Money Still Gru” with meme humor. Funny Minions parody shirt that says “The Streets Turned Me Despicable But My Money Still Gru” with meme humor. Funny Minions parody shirt that says “The Streets Turned Me Despicable But My Money Still Gru” with meme humor. Funny Minions parody shirt that says “The Streets Turned Me Despicable But My Money Still Gru” with meme humor.

    *NEW* Streets Turned Me Despicable Minions Tee

    *NEW* Streets Turned Me Despicable Minions Tee

    From $24.99 USD
    From $24.99 USD
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  • 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
  • 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
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    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
  • Funny LGBTQ meme shirt with the word “Faguette” styled like a baguette pun — great for Pride, Gen Z humor, and unhinged gay energy. Funny LGBTQ meme shirt with the word “Faguette” styled like a baguette pun — great for Pride, Gen Z humor, and unhinged gay energy. Funny LGBTQ meme shirt with the word “Faguette” styled like a baguette pun — great for Pride, Gen Z humor, and unhinged gay energy. Funny LGBTQ meme shirt with the word “Faguette” styled like a baguette pun — great for Pride, Gen Z humor, and unhinged gay energy. Funny LGBTQ meme shirt with the word “Faguette” styled like a baguette pun — great for Pride, Gen Z humor, and unhinged gay energy. Funny LGBTQ meme shirt with the word “Faguette” styled like a baguette pun — great for Pride, Gen Z humor, and unhinged gay energy. Funny LGBTQ meme shirt with the word “Faguette” styled like a baguette pun — great for Pride, Gen Z humor, and unhinged gay energy. Funny LGBTQ meme shirt with the word “Faguette” styled like a baguette pun — great for Pride, Gen Z humor, and unhinged gay energy. Funny LGBTQ meme shirt with the word “Faguette” styled like a baguette pun — great for Pride, Gen Z humor, and unhinged gay energy. Funny LGBTQ meme shirt with the word “Faguette” styled like a baguette pun — great for Pride, Gen Z humor, and unhinged gay energy. Funny LGBTQ meme shirt with the word “Faguette” styled like a baguette pun — great for Pride, Gen Z humor, and unhinged gay energy. Funny LGBTQ meme shirt with the word “Faguette” styled like a baguette pun — great for Pride, Gen Z humor, and unhinged gay energy. Funny LGBTQ meme shirt with the word “Faguette” styled like a baguette pun — great for Pride, Gen Z humor, and unhinged gay energy. Funny LGBTQ meme shirt with the word “Faguette” styled like a baguette pun — great for Pride, Gen Z humor, and unhinged gay energy.

    *NEW* Faguette Baguette LGBTQ Tee

    *NEW* Faguette Baguette LGBTQ Tee

    From $24.99 USD
    From $24.99 USD
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    Size
  • Bold black mesh funny trucker hat with white text that says “Less Naggin More Gaggin” — an outrageous drinking hat for men who love crazy humor, inappropriate sayings, and wild nights out. Bold white mesh funny trucker hat with black text that says “Less Naggin More Gaggin” — an outrageous drinking hat for men who love crazy humor, inappropriate sayings, and wild nights out. Bold pink mesh funny trucker hat with black text that says “Less Naggin More Gaggin” — an outrageous drinking hat for men who love crazy humor, inappropriate sayings, and wild nights out.

    Less Naggin More Gaggin Hat

    Less Naggin More Gaggin Hat

    $29.99 USD
    $29.99 USD
    Color
  • Funny inappropriate trucker hat that reads “I Need Moral Support” with the M crossed out to say “I Need Oral Support” — a hilarious mesh-back hat for men with bold humor and unforgettable hat sayings perfect for parties or bar nights. Funny inappropriate trucker hat that reads “I Need Moral Support” with the M crossed out to say “I Need Oral Support” — a hilarious mesh-back hat for men with bold humor and unforgettable hat sayings perfect for parties or bar nights. Product mockup Funny inappropriate trucker hat that reads “I Need Moral Support” with the M crossed out to say “I Need Oral Support” — a hilarious mesh-back hat for men with bold humor and unforgettable hat sayings perfect for parties or bar nights.

    I Need Moral Support Oral Hat

    I Need Moral Support Oral Hat

    $29.99 USD
    $29.99 USD
    Color
  • Funny inappropriate trucker hat that reads “Strip Club Veteran” in military-style text — a hilarious gift hat for men who love crazy humor, drinking hats, and bold party statements.

    Strip Club Veteran Hat

    Strip Club Veteran Hat

    $29.99 USD
    $29.99 USD
  • Funny Call Me A 737 Cause I Got A Few Screws Loose And Sucked A Guy Off T-Shirt featuring adult humor and meme-inspired design, perfect for casual wear and humor lovers. Funny Call Me A 737 Cause I Got A Few Screws Loose And Sucked A Guy Off T-Shirt featuring adult humor and meme-inspired design, perfect for casual wear and humor lovers. Funny Call Me A 737 Cause I Got A Few Screws Loose And Sucked A Guy Off T-Shirt featuring adult humor and meme-inspired design, perfect for casual wear and humor lovers. Funny Call Me A 737 Cause I Got A Few Screws Loose And Sucked A Guy Off T-Shirt featuring adult humor and meme-inspired design, perfect for casual wear and humor lovers. Funny Call Me A 737 Cause I Got A Few Screws Loose And Sucked A Guy Off T-Shirt featuring adult humor and meme-inspired design, perfect for casual wear and humor lovers. Funny Call Me A 737 Cause I Got A Few Screws Loose And Sucked A Guy Off T-Shirt featuring adult humor and meme-inspired design, perfect for casual wear and humor lovers. Funny Call Me A 737 Cause I Got A Few Screws Loose And Sucked A Guy Off T-Shirt T-Shirt featuring adult humor and meme-inspired design, perfect for casual wear and humor lovers. Funny Call Me A 737 Cause I Got A Few Screws Loose And Sucked A Guy Off T-Shirt T-Shirt featuring adult humor and meme-inspired design, perfect for casual wear and humor lovers. Funny Call Me A 737 Cause I Got A Few Screws Loose And Sucked A Guy Off T-Shirt T-Shirt featuring adult humor and meme-inspired design, perfect for casual wear and humor lovers. Funny Call Me A 737 Cause I Got A Few Screws Loose And Sucked A Guy Off T-Shirt T-Shirt featuring adult humor and meme-inspired design, perfect for casual wear and humor lovers. Funny Call Me A 737 Cause I Got A Few Screws Loose And Sucked A Guy Off T-Shirt T-Shirt featuring adult humor and meme-inspired design, perfect for casual wear and humor lovers. Funny Call Me A 737 Cause I Got A Few Screws Loose And Sucked A Guy Off T-Shirt T-Shirt featuring adult humor and meme-inspired design, perfect for casual wear and humor lovers. Funny Call Me A 737 Cause I Got A Few Screws Loose And Sucked A Guy Off T-Shirt T-Shirt featuring adult humor and meme-inspired design, perfect for casual wear and humor lovers. Funny Call Me A 737 Cause I Got A Few Screws Loose And Sucked A Guy Off T-Shirt featuring adult humor and meme-inspired design, perfect for casual wear and humor lovers.

    Call Me A 737 Cause I've Got A Few Screws Loose And Sucked A Guy Off Tee

    Call Me A 737 Cause I've Got A Few Screws Loose And Sucked A Guy Off Tee

    From $24.99 USD
    From $24.99 USD
    Color
    Size
  • Funny “Lajewbu” tee serves unapologetic humor with a controversial twist, parodying the viral Labubu doll through a Jewish lens. Funny “Lajewbu” tee serves unapologetic humor with a controversial twist, parodying the viral Labubu doll through a Jewish lens. Funny “Lajewbu” tee serves unapologetic humor with a controversial twist, parodying the viral Labubu doll through a Jewish lens. Funny “Lajewbu” tee serves unapologetic humor with a controversial twist, parodying the viral Labubu doll through a Jewish lens. Funny “Lajewbu” tee serves unapologetic humor with a controversial twist, parodying the viral Labubu doll through a Jewish lens. Funny “Lajewbu” tee serves unapologetic humor with a controversial twist, parodying the viral Labubu doll through a Jewish lens. Funny “Lajewbu” tee serves unapologetic humor with a controversial twist, parodying the viral Labubu doll through a Jewish lens.

    *NEW* Lajewbu Labubu Tee

    *NEW* Lajewbu Labubu 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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