[noun] someone who is unsuccessful Synonyms:flop, washout
[noun] an explosion that fails to occur Synonyms:misfire
[noun] 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" Synonyms:turkey, bomb
[adjective] failing to detonate; especially not charged with an active explosive; "he stepped on a dud mine"
