Slutercup Share definition Flag Both slut and buttercup combined into one word. a cute name for a girl with a good slut personality. Guy 1: yo whose that girl Boyfriend: Shes my slutercup. she gives good bj Slutercup by Moans69 July 19, 2012 0 0 Get merch Get the Slutercup mug. Buy Now — $32.95 See more merch