A dry, crusty little piece of excrement that firmly grips and swings from one's arse hairs in a similar manner to that of a monkey on a vine.
Showering BEFORE shitting is a sure-fire recipe for poo monkeys.
by Andrew Thompson May 02, 2005
When you take a poop so big that it is the size of a monkey!!
Dude go in the bathroom and check out my Poo Monkey
by Mike McStoner April 23, 2009