dud

dud (http://definr.com/dud)

     adj : failing to detonate; especially not charged with an active
           explosive; "he stepped on a dud mine"
     n 1: (informal) 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]