Dickass Share definition Flag Adj: Term used for an especially rude, mean, or just generally unpleasant person. Despite Tadashi and Kenny being good friends, Hiro thinks Kenny is a dickass and Tadashi could find better friends elsewhere. Dickass by Astellaria August 30, 2020 0 0 Get merch Get the Dickass mug. Buy Now — $32.95 See more merch