Made famous by early wrestler "Tough Tony Bourne," the poo drop involves knocking an opponent to the ground, and jumping on top of said opponent ass-first, landing on the persons' face. Execution of a true poo drop involves fecal matter on the outside of your wrestling tights and making sure some sticks to your opponents' face until the match is over.
Person 1: Wow! Did you see that?
Person 2: Holy crap, what happened?
Person 1: I think Steve was mad at Jim...he just gave him the ol' poo drop!