dud /dʌd/noun 5adjective 1verb 1forms 4 noun5 •(informal) A device or machine that is useless because it does not work properly or has failed to work, such as a bomb, or explosive projectile.Alzheimer's Drug Aduhelm Went From Being Hailed A 'Game Changer' To A Dud — 2024 •(informal) A failure of any kind.I got stuck with a seatmate who was a conversational dud. •(informal) A loser; an unlucky person. •(informal) A lottery ticket that does not give a payout. •(informal, no longer used) Clothes, now always used in plural form duds. adjective1 •Useless; failing; ineffective.[…] they're flying in the duddest of dud weather to hold the Germans back. — 2019 verb1 •(Australia) to swindle; to deceive or rip off. formsdudded · dudding · duds · duddest
