When a group of people gather for an orgy and then proceed to poop on a pre-placed tarp thus using the poop for slip-n-slide type merriment. This was first invented in Puerto Rico because they are poor and often seek unconventional forms of "fun".
J.d.- Dude i totally just bought a new tarp. We can poop on it and slide around just like in Puerto Rico.
Taylor- Yeah dude. We could get some bitches so it's not gay and totally have a Puerto Rican Mudslide.