Monday’s Official Uniform: The “Up Yours” Grumpy Cat Tee

Price range: $27.99 through $29.99

Your new favorite way to say “Not Today.” > This isn’t just a shirt; it’s a mood. Featuring our signature grumpy, middle-finger-flipping cat in a bold paint-splash style, this tee offers the perfect blend of irreverent humor and premium comfort.

  • Fabric: 100% Heavyweight Cotton (Gildan 5000)

  • Fit: Classic unisex fit—roomy and reliable.

  • Vibe: 100% Sarcastic.

Standard shipping available. Grab yours and make Mondays bearable.

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Up Yours Monday – The “Leave Me Alone” Tee

Let’s be honest: sometimes a double-shot espresso just doesn’t send a clear enough message. Enter our Up Yours Monday cat. With a face that screams “not today” and a middle finger rendered in bold, chaotic red and blue paint splashes, this shirt does the talking so your vocal cords don’t have to.

Whether you’re dodging meetings, ignoring the gym, or just surviving another Monday, this tee is your official uniform for stylish defiance.

The “Feels Good” Details

We didn’t just slap a grumpy cat on a cheap rag. We used the legendary Gildan 5000 chassis—the gold standard for comfort and durability:

  • 100% Heavyweight Cotton: Breathable enough for a hike, but tough enough to survive a mosh pit (or a very aggressive nap).

  • The Perfect Fit: A classic, roomy crew neck that looks just as good under a flannel as it does on its own.

  • No Itch, No Problem: Features a tear-away label because nothing ruins a rebellious mood like a scratchy neck tag.

  • Built to Last: Reinforced shoulder taping and a ribbed collar mean this shirt keeps its shape, even after Monday wins a round.

Tech Specs for the Nerds

  • Fabric: 100% Cotton (180 g/m²)

  • Print: High-definition DTG/DTF printing for colors that pop and stay crisp.

  • Build: Tubular knit construction (no side seams!) for a better drape and less waste.


Care Instructions (Keep the Cat Grumpy, Not Faded)

  • Wash: Machine wash cold (max 30C or 90F). Turn it inside out to protect the artwork!

  • Dry: Tumble dry on low heat.

  • Bleach: Non-chlorine only (if you absolutely must).

  • Hard No’s: Do not iron the design and do not dry clean. The cat hates chemicals.

S M L XL 2XL 3XL 4XL 5XL
Width, in 18.00 20.00 22.00 24.00 26.00 28.00 30.00 32.00
Length, in 28.00 29.00 30.00 31.00 32.00 33.00 34.00 35.00
Sleeve length (from center back), in 15.10 16.50 18.00 19.50 21.00 22.40 23.70 25.00
Size tolerance, in 1.50 1.50 1.50 1.50 1.50 1.50 1.50 1.50

Fits true to size. If you prefer that ‘oversized meme-lover’ look or plan on shrinking it in a hot dryer, we recommend sizing up!

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monday's official uniform: the "up yours" grumpy cat teeMonday’s Official Uniform: The “Up Yours” Grumpy Cat Tee
Price range: $27.99 through $29.99Select options