Mut Rash Share definition Flag When a "Mut"(Vagina) has become infected with any and all sorts of diseases / viruses. I was just about to bang this chick until I saw the dirtiest Mut Rash I've ever seen! Mut Rash by SkidZz March 14, 2011 0 0 Get merch Get the Mut Rash mug. Buy Now — $32.95 See more merch