Deadback Share definition Flag A racial slur for a member of the living impaired. In other words, it is a derogatory term used to refer to zombies. Let's jump on left 4 dead tonight and kill some of them goddamn deadbacks! Deadback by LeemanMasteroftheUniverse August 28, 2009 0 0 Get merch Get the Deadback mug. Buy Now — $32.95 See more merch