Duuf Share definition Flag Originated from the German word "doof". Similar to the word dumb, or stupid. It's used with a "u" because of the nicaraguan teenagers Tuti and Carmen. "Mae sos un duuf" "Ala gran duuf" "Te pasas de duuf" "Supa duuf" Duuf by TutiCarduf June 21, 2016 0 0 Get merch Get the Duuf mug. Buy Now — $32.95 See more merch