A game to break up a boring or awkward moment by punching someone in the butt, usually an innocent bystander. After you punch them you proclaim, "punch in the butt!"
frank: what a wast of time why am i here? Ow! what the hell man?!

Billy: Punch in the butt!
by itaub1 August 31, 2010
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phrase used negatively when saying "fuck me up the ass" is not appropriate.
this is not meant to be explicit. PUNCH ME- aggressive while UP THE BUTT- just all around bad.
"DUDE i have to go to a debate tournament instead of a rave. Punch Me Up The Butt"

"lolz h3 pwn'd m3. PMUTB"
by Lil Ton February 20, 2008
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Punch yo butt” is the latest slang that’s sweeping the nation!! Instead of saying “fuck you” you just throw them a “punch yo butt” and the harshness of the burn mixed in with the hilarity of the phrase makes it comedy gold.
Mark told Isaac, “I have to cancel day drinking to go antiquing”. Mark replied with “yo, punch yo butt
by Thomas > david March 12, 2021
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For one to punch their own butt, believing it's more effective than doing squats.
"If you want to get that cake, simply punching butt with a closed fist instead of doing squats"
by Nenshou Shikon May 5, 2022
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