1. An event that fails badly or is totally ineffectual
   "the meeting was a dud as far as new business was concerned";
   - turkey [informal], bomb [informal], flop [informal], clunker [N. Amer, informal]
    
2. An explosion that fails to occur
   "The dud grenade was safely removed from the training ground";
   - misfire
    
3. A complete failure
   "The highly anticipated movie turned out to be a dud at the box office";
   - flop [informal], bust [informal], fizzle, clinker [N. Amer, informal], epic fail [informal], washout, clunker [N. Amer, informal]

1. Failing to detonate; especially not charged with an active explosive
   "he stepped on a dud mine"

Derived forms: duds

See also: unloaded

Type of: breakdown, equipment failure, failure, loser, no-hoper [informal], nonstarter, unsuccessful person

Encyclopedia: Dud