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You cannot be serious. Sticker

$3
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This design riffs on John McEnroe’s most iconic tennis outburst — “You cannot be serious.” — now immortalized in bold hot-pink text with the tongue-in-cheek footer “John McEnroe Appreciation Society.” It’s equal parts sports nostalgia, humor, and pop-culture commentary, making it perfect for tennis fans, lovers of classic 80s moments, or anyone who thrives on a little dramatic flair. A playful tee or print that blends retro energy with meme-worthy style.

Individually kiss cut vinyl sticker. Semi gloss finish. 3 x 4 inch max size includes a thin white border around the sticker. Not recommended for automobile use. Perfect for placing on your laptop, notebook or almost anywhere your imagination leads!

UPS MI Domestic (6-8 Business Days)

FedEx 2-Day (4-6 Business Days)

Estimates include printing and processing time.More Shipping Info

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