dumbchuck Share definition Flag A word that is a very bad insult to a bunch of idiots who just found out that any word is a bad word if you use it in a bad way. "Get off my woman you dumbchuck!!!" dumbchuck by R. W. Cozby June 9, 2005 0 0 Get merch Get the dumbchuck mug. Buy Now — $32.95 See more merch