Slut-Mutt Share definition Flag A very permiscuous girl (slut) who also has a very bitchy attitude. (bitch=mutt). That girl I just met from the bar totally wanted to blow me but I could deal with her bitchy personality anymore, damn slut-mutt. Slut-Mutt by MistahBradshaw August 30, 2010 0 0 Get merch Get the Slut-Mutt mug. Buy Now — $32.95 See more merch