pretty self explanatory, but the act of shitting shirtless.
"Why's your shirt off?"

"Gotta go do some shirtless shitting"
by akalk May 06, 2008
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When you are taking a shit and are forced to remove your shirt because you are so hot and the poop is just not flowing freely.
Tom: Dude...worst afternoon.

Matt: Whys that dude?

Tom: I had to take a shirtless shit because it just got too intense in there.
by Professor Pod May 21, 2011
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