dud
       adj : failing to detonate; especially not charged with an active
             explosive; "he stepped on a dud mine"
       n 1: someone who is unsuccessful [syn: flop, washout]
       2: an explosion that fails to occur [syn: misfire]
       3: an event that fails badly or is totally ineffectual; "the
          first experiment was a real turkey"; "the meeting was a
          dud as far as new business was concerned" [syn: turkey,
          bomb]