a dundie Share definition Flag A fake species of birds, that is actually used to call someone an idiot Guy: The Statue of Liberty is in New Jersey right? Guy 2: No, it's in New York. You're such a dundie! a dundie by Daddy_Boi September 11, 2018 0 0 Get merch Get the a dundie mug. Buy Now — $32.95 See more merch