Dumbassidus Share definition Flag adjective- one being a dumbassverb- to act like a stupid fuck "No you didn't have a a blonde moment, just a bad case of dumbassidus" Dumbassidus by heavenshootermanFT July 28, 2012 0 0 Get merch Get the Dumbassidus mug. Buy Now — $32.95 See more merch