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1.
take a dump
be right back, gotta pinch a loaf
by a March 27, 2000
 
2.
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
 
3.
to defecate(see also take a dump)
If you will excuse me, I have to pinch a loaf.
by Light Joker January 11, 2005
 
5.
A slang term (not very well known). Its a term describing what happens when you release matter from your bowels. Many use the term instead of a derogitory 4 letter word because it sounds less harsh. In the example below you will see how easy it can be used when you are speaking to loved ones.
I'll take out the trash after I pinch a loaf.
by B. Steed January 02, 2005
 
6.
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
 
7.
(Verb) To take a bowel movement.
Oh man, I gotta pinch a loaf wicked bad!
by Peter May 29, 2006