scumonaut Share definition Flag An individual who, either through the way they dress or their actions, is such a scumbag they venture into areas of scumbaggery not yet explored by the rest of humanity. Did you see that shirt Joey was wearing? He's really becoming a scumonaut. scumonaut by Diss3nt October 17, 2007 0 0 Get merch Get the scumonaut mug. Buy Now — $32.95 See more merch