slutbackwhore Share definition Flag 1. A woman, prefrebably a whore who lets either a man or a woman cum on their back and lets it dry. 1. Have you seen jenny? She hasn't been here since she became a slutbackwhore slutbackwhore by Reuben Castaneda April 18, 2008 0 0 Get merch Get the slutbackwhore mug. Buy Now — $32.95 See more merch