diduhdoo Share definition Flag A simple minded buffoon. Usually totally clueless. Very similar to a marmalukeexcept a little stupider and more fun to laugh at. Did you hear George Bush talking the other day? What a fucking diduhdoo. diduhdoo by Jonny21 January 28, 2008 0 0 Get merch Get the diduhdoo mug. Buy Now — $32.95 See more merch