derf nerf Share definition Flag a complete idiot,derf as in what a tard mumbles nerf as in their head is as soft as a nerf ball i explained how to do it 5 times and the guy still doesnt get it what a fucking derf nerf derf nerf by tube June 11, 2006 0 0 Get merch Get the derf nerf mug. Buy Now — $32.95 See more merch
