dud

noun

• 1a thing that fails to work properly or is otherwise unsatisfactory or worthless:all three bombs were duds
• an ineffectual person: a complete dud, incapable of even hitting the ball

• 2 (duds) clothes:buy yourself some new duds

adjective

• not working or meeting standards; faulty:a dud ignition switch
• counterfeit:she was charged with issuing dud cheques