Person wearing a white t-shirt with 'Crop Dustin' graphic design in a bathroom. Person wearing a white t-shirt with 'Crop Dustin' graphic design in a bathroom.

Designs That Make Your Inner 12-Year-Old Proud

Maturity is overrated. Poop jokes never go out of style.

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Discover new ways to give yourself a secret smile at your next family gathering.

The Story Behind The Slappery.

Our products were designed to make you laugh while questioning your life choices.

Kneeslappery was started by a guy with a brain full of toilet jokes and too much access to desgin software and print-on-demand services.

We’re not here to win awards. We’re here to make it harder for you to find a shirt to wear at Thanksgiving.

Flushed with Praise

See reviews & feedback from satisfied and totally real customers.

5
Before Kneeslappery, girls wouldn’t even look at me. Now? They still don’t… but at least they smile and laugh when I walk by. That’s called progress.
Trevor R.
Student
5
My husband suffers from chronic constipation. Every trip to the toilet is an emotional and physical battle. I ordered some of your ‘motivational bathroom art,’ thinking, what do I have to lose? He walked in, saw the print, laughed so hard he s*** himself on the spot. No straining. No tears. Just pure relief. Thanks again!
Jessica K.
Long-suffering wife and new believer
5
I don’t smile. I don’t joke. I don’t believe in fun. I eat my oatmeal plain and find ice water too fancy. But I ordered a Kneeslappery shirt that said ‘Gas Powered’ under a picture of a fart cloud. I wore it once. My wife laughed so hard she snorted. I’ve since bought seven more. That snort was adorable.
Francis H.
Recovering Buzzkill