slutrash Share definition Flag a rash caused by fucking a dirty slut with an STI such as herpes. or a word used to describe a female that shags about frequently. ive got a right slutrash after banging that dirty bitch .orfuck me shes a right slut rash she is slutrash by monkeyboy12345 October 24, 2012 0 0 Get merch Get the slutrash mug. Buy Now — $32.95 See more merch