StupidDumbIdiot Share definition Flag A word to call someone who is really stupid dumb and is an idiot. Usually said really fast or muttered under the breath. "Wow, you would do something like that. You StupidDumbIdiot." StupidDumbIdiot by plaird18 June 29, 2009 0 0 Get merch Get the StupidDumbIdiot mug. Buy Now — $32.95 See more merch