The art of removing your shirt at inappropriate times and places.
"Hey Mike, why does that guy have his shirt off in Church? Because Bill, its a Shirtless Revolution!"
by ONEAL DUDE February 17, 2009
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That one crazy dude in every neighbourhood who is almost exclusively seen without his shirt. Either ridiculously skinny due to too much exercise, or overweight due to too much alcohol. Best avoided by kids so they do not end up scarred for life.
Shirtless Bob's walking past the house again... lock the windows!
by meowlnir July 2, 2016
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the act of sleeping half naked, or with clothing only around the waist, where the upper torso is exposed, typically a practice performed by men
John is sleeping shirtless during this heat wave
by Ray Orta October 23, 2006
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The ripped guy in a particular group that works out a lot & takes off his shirt every. chance. he gets.
They could understand that Matt was Shirtless Guy when he mowed the lawn, or played basketball, or fetched the mail from the mailbox, but to their amazement, Matt was Shirtless Guy for Thanksgiving, when it was 15°.
by catfight12 January 12, 2009
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Being scared to the point where your shirt comes off.
Ben: Dude, that movie had me scared shirtless.

Dan: Me too bro. I think some lady stole my shirt off the ground
by omgstfuplz June 3, 2010
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pretty self explanatory, but the act of shitting shirtless.
"Why's your shirt off?"

"Gotta go do some shirtless shitting"
by akalk May 6, 2008
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Used as a nonsense response to threads on the "Lost" iMDB message boards not deemed worthy of a proper reply. Variations include: Mopless Kevin, Lifeless Locke, Waltless Michael, Caneless Nestor.
Original Poster: Whatever happened to Rose and Bernard?

Responding Poster: Shirtless Sawyer.
by Benry_Lale May 23, 2009
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