Carcase Fart
After performing anal penetration with a (recent) corpse (provided the body is still warm), the carcase releases gas from its bowels.
Justin: Hey Matt, I totally just fucked your mom's body after I killed her!
Matt: Oh yeah?
Justin: Yeah dude it was good. Except she totally carcase farted all over my schlong.
Matt: That's probably from the volcano taco she just ate.
Matt: Oh yeah?
Justin: Yeah dude it was good. Except she totally carcase farted all over my schlong.
Matt: That's probably from the volcano taco she just ate.