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.
by RandomThoughtGenerator February 8, 2010
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.
by Eaton Holgoode March 20, 2017