Literal: When some takes a stick, shoves it up the ass, and shits while the stick is still up their ass.
Fred: Ooh! look at that stick. Who wants shit on a stick?
Wyatt: Oh! I do.
Fred: Okay! look away....
Fred: Here you go!
Wyatt: Aww gross! It tastes and smelles like shit!
Fred: NO SHIT!