True...
Dud:
flop: someone who is unsuccessful
misfire: an explosion that fails to occur
failing to detonate; especially not charged with an active explosive; "he stepped on a dud mine"
turkey: an event that fails badly or is totally ineffectual
A dud is an ammunition round or explosive that fails to fire or detonate, respectively, on time or on command. Duds are still dangerous and have to be de-activated and disposed of carefully. Poorly designed devices (for example, IEDs), and small devices, have higher chances of being dud.
en.wikipedia.org/wiki/Dud
A broken or nonfunctional device that does not perform its intended function, such as a bomb; Clothes, now always used in plural form duds
Or as this guy thought of a Movie he went too...