mudpie delight
Verb: The act of shitting into your hand, and then using the shit to masterbate with. Mudpie delights are a great way to get infections in your penis.
Matt:"I wonder what that creepy kid in our algebra class does when he goes home?"
Chris:"Idk he prob goes home and beats his dick with his shit."
Matt:"Oh like a mudpie delight?"
Chris:"Dude who the hell comes up with names for that stuff...."

Charlie gave himself a mudpie delight before his girlfriend gave him head, cuz she's a cheating slut.