This often is caused by women who wipe backwards, from back to front, dragging the poop from their ass into their vagina, hence PooPussy.
Big Daddy: Fuck man it was good at first till i pulled my dick out to switch positions and saw that my dick was covered in brown spots.
Dabbs: EWWWWW dog, home gurl got that poopussy
Poo- from Latin puppa
Pussy- from Low German Puus-katte, Puus-man.
Girl 2: Oh my God I know. I was at the gym the other day and when she bent over to get the soup somebody yelled, "Poopussy alert!" I wanted to laugh so fucking bad.