An sensationably erratic monkey that upon will, explodingly emits from ones anus. A great deal of straining is required to make this magnificent creature leave its home and expel from its cave. Ineffective attempts to expel an anal dwelling butt monkey can produce the commonly known problem called hemorrhoids.
"Man he bent over to fart and out popped an anal dwelling butt monkey!"
A monkey that lives in someone's hind quarters. it is usually painful when they enter and exit their home, if you are their chosen nesting spot. Such behavior of monkies can be found on the film Bruce Almighty.
1. guy: Holy freak, that monkey came out of his crack!
other guy: yeah, that's an anal dwelling butt monkey.