Dumb Assery Share definition Flag The trappings, accoutrements, and doings of a dumb ass. Come on guys, let's go home. This sort of dumb assery is going to get us all arrested. Bill, put down that hammer! Dumb Assery by The Real Jack Jones September 28, 2007 0 0 Get merch Get the Dumb Assery mug. Buy Now — $32.95 See more merch