To expel solid waste from the anus. Refered to in the movie "Shawshank Redemption".
guard: I'm gonna go Pinch-A-Loaf, so this stuff better be cleaned up before the wardon gets back
by Ryan Hershbeger June 02, 2006
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The act of dispursing poo out of the anus. Slang terms include: pinch a mean one, dropping the kids off at the pool, taking the browns to the super bowl, taking a dump, lose some poundage, drop a load, etc.
Hey man, I really gotta Pinch-A-Loaf, can I use your bathroom?
by Monnor Cunn July 19, 2010
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Or to pinch a loaf - having a shit
1. yo bitch get my dinner ready, i'm gonna go pinch a loaf
2. i wouldn't go in there for 35-40 minutes, some bastards' pinched a loaf
by Bob April 06, 2004
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Pinching a loaf refers to when one's sphincter clenches up mid-bowel movement, and cuts the egressing turd in half. The result is usually that one will have to wipe oneself raw in an effort to return one's rectum to a pristine un-befouled state of cleanliness.
Wife: Honey, what's taking you so long. We're going to be late.

Husband: I pinched a loaf, dear. Now I'll have to take another shower.

Wife: Oh, the humanity! I'll see if I can push back our reservations.

by Hoopermazing September 08, 2006
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Using your sphincter muscle to "pinch" a loaf of shit that is hanging halfway out your ass and won't drop of its own accord. Pinching a loaf always results in extra-messy wiping.
"Hurry up and finish taking a shit, we're already late! Pinch the loaf if you must!"

"Thanks for suggesting that I pinch a loaf; it worked. Now I have to spend 5 minutes wiping, then we can leave."
by bingobastard March 28, 2009
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