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its when your taking a shit, and the poo is just hanging out your ass, so you shake your ass back and forth so the poo falls out.
Person 1 : i had a hard time taking a shit, but i poo shaked and it was all in the good
Person 2 : i love penuz.
by funnyshit November 15, 2006
A combination of dried (either by the heat of the sun, or by oven) excrement with milk.
Stevo: Damn Bubba it's so hot in here. U got anythin to drink?

Bubba: Hell yeah, try one of my pooshakes
by Peter Blomley June 18, 2008