dumazz Share definition Flag this word means u are a dumbass, loser, someone's whos stupid, not worth talking to, annoying, ugly,weird, and just plain u!!! Girl: ugh i forgot to wear underwear today boy:DUMAZZ!! dumazz by aLbERT && saLvAWHoREE <33 April 21, 2006 0 0 Get merch Get the dumazz mug. Buy Now — $32.95 See more merch