1. A condition caused from gay anal sex where fecal material runs down the back of the scrotum.
2. A condition caused by fecal material in your pants that is pressed into the scrotum.
1. After Dave pulled his cock out of Matt's ass, he noticed Matt had poopynuts.
2. Matt shit his pants while stalking people in his truck. He then said to himself,"Great, now I've got poopynuts!".