When
someone passes out (or it could happen during kinky sex, you decide) and someone else (usually of the opposite sex) bends over and takes an enormous
crap on the persons face while simultaneously rubbing their ass cheeks into it, creating a sludgy
pool of human feces all over the persons face.
"Yo, Dean, what did you do with your
new girlfriend last
night?"
"
Rob, I moonfaced that bitch!!"