dumpasaurus rex Share definition Flag a tremendous dump, so large that it literally roars forth from your asshole and fills the entire bowl. Get the fuck out of my way Charlie, I have to take a dumpasaurus rex! dumpasaurus rex by teabagg bandit May 14, 2005 0 0 Get merch Get the dumpasaurus rex mug. Buy Now — $32.95 See more merch