Sissyfucker Share definition Flag Someone who is too lame to be called a motherfucker He slept with his best friend's girlfriend, stole my dog, and slapped his grandma. What a sissyfucker. Sissyfucker by PBish2323 January 22, 2017 0 0 Get merch Get the Sissyfucker mug. Buy Now — $32.95 See more merch