When you have to take a crap so bad that it feels like it has already started to "peek" out your ass similar to a turtles head when it comes out of its shell.
The turtle is peeking. If I don't get to a bathroom right now, I'm going to shit my pants.
A euphemistic expression regarding the extreme urgency to defecate and holding it in as much in as possible. Having the pressure of a fecal turd poking itself partially out of the bum hole while trying to make it to the closest restroom.
Roger sprinted down the hall from his desk to the restroom. He has a turtle peeking.
Pronounced like the chinese dish Peking duck, the Peeking Chicken occurs when the male genitalia, or penis, flops out of one's pants, i.e., through the fly or other such aperture. Such occurences can result in either embarassing or comedic effects.
Male 1: Um... Excuse me, sir, but... It has come to my attention that your manhood is clearly and obtrusively visible, as it is protruding from your trousers.
Male 2: Oh dear! (hastily tucks weiner back into pants) The scourge of Peeking Chicken has struck once more...
When you have to crap so bad it feels like you literally have a gopher peeking out your sphincter. Not to be confused with it's cousin, the "frightened turtle."