Muddy Goat

Noun - When you and your partner, sit ass to ass, and she reaches between her legs and pulls your balls towards her and proceeds to shit and piss on your balls.

Megan was bored with her usual fecal play, so she went ass to ass with her man and gave him a muddy goat.

The Muddy Goat

The act of tucking your package back and in between your legs, right after successfully dropping a deuce and failing to wipe away the remaining poop. This is a more disgusting variation of "The Goat", a move made popular by the cast if the movie "Waiting".

Oh man, Brett just dropped the muddy goat on me when I walked into the bathroom