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A dud is in general something that fails to function in the way it is intended to. In a military context the word is often used to refer to an ammunition round or explosive that fails to fire or detonate as expected. Poorly designed devices (for example, improvised explosive devices (IEDs), shoddy workmanship at the munitions factory, over-complicated fuses, and small devices, have higher chances of being duds. During the Continuation War 1941-1944, Finns estimated up to 20% to 30% of all Soviet shells would be duds. Duds are still dangerous, and can explode if handled. They must be deactivated and disposed of carefully. In war-torn areas, many curious children have been injured or killed from tampering with such devices.

The variation absolute dud describes a nuclear weapon that fails to explode. (A nuclear weapon which does explode, but does not achieve its expected power, is termed a fizzle.)

Etymology

The term descends from the Middle English dudde, originally meaning worn-out or ragged clothing, and is a cognate of duds (i.e., "clothing") and dowdy. Eventually dud became a general pejorative for something useless, including ammunition. The word's use is attested from 1355.

See also

• Bomb disposal
• Firearm malfunction
• Unexploded ordnance

References

1. ^ "dud". Oxford English Dictionary (Online ed.). Oxford University Press. doi:10.1093/OED/1145117759. (Subscription or participating institution membership required.)
2. DOD Dictionary of Military and Associated Terms

• Ammunition