dud

[1]	failure , flop , washout , (Colloq) flop , lead balloon , lemon , washout , (Colloq) (US/Canadian) dog , clinker
[2]	misfire
[3]	turkey , bomb

adj.

[1]	worthless , valueless , broken , unusable , useless , inoperative , non-functioning , inoperative , malfunctioning , (Colloq) kaput , bust(ed) , (Brit) duff