dud
nounUK /dʌd/
US /dʌd/
A dud is something that does not work or is not good.
The firework was a dud and did not go off.
OTHER MEANINGS
2. A bomb or shell that fails to explode.
Soldiers found a dud in the field.
3. A person who is dull or unsuccessful.
He felt like a dud at the party.
4. Clothes that are old and worn out.
He wore his duds to paint the house.