(dialectal) Dough. / A stiff flour pudding, often with dried fruit, boiled in a cloth bag, or steamed. / A pudding-style dessert, especially one made with plums.

(Scotland, US) Decaying vegetable matter on the forest floor. / Coal dust, especially that left after screening or combined with other small, unsaleable bits of coal.

(UK) Worthless; not working properly, defective.

(US, slang) The buttocks.

(slang, obsolete) To disguise something to make it look new. / (Australia) To alter the branding of stolen cattle; to steal cattle. / (Britain, slang, with "up") To beat up.

Alternative form of daf (type of drum)

Third-person singular simple present indicative form of duff

(slang, derogatory) Acronym of dumb/designated ugly fat friend, an attractive woman's less attractive friend

(UK, Ireland, Canada, Australia, New Zealand, Singapore, military slang, radio voice procedure) Indicating that this is not a drill or training exercise.

(UK, Ireland, Canada, Australia, New Zealand, Singapore, military slang, radio voice procedure) An incident that is not a drill or training exercise; an emergency. Also end of exercise. Stop drill immediately. As a ‘tap out’ called by during physical training. Sim munitions training in Australian Swat ‘end ex’.