duff

Short definition from Wiktionary

Noun

1. 1
   Dough.
2. 2
   A stiff flour pudding, often with dried fruit, boiled in a cloth bag, or steamed.
3. 3
   A pudding-style dessert, especially one made with plums or (in the Bahamas) guavas.
4. 4
   Decaying vegetable matter on the forest floor.
5. 5
   Coal dust, especially that left after screening or combined with other small, unsaleable bits of coal.
6. 6
   Fine and dry coal in small pieces, usually anthracite.
7. 7
   A mixture of coal and rock.
8. 8
   The bits left in the bottom of the bag after the booty has been consumed, like crumbs.
9. 9
   Something spurious or fake; a counterfeit; a worthless thing; a defective thing.
10. 10
    An error.
11. 11
    The buttocks.
12. 12
    Alternative form of daf (“type of drum”).
13. 13
    Acronym of dumb/designated ugly fat friend, an attractive woman's less attractive friend.

Adjective

1. 1
   Worthless; not working properly, defective.

Verb

1. 1
   To disguise something to make it look new.
2. 2
   To sell spurious goods, often under pretence of their being stolen or smuggled.
3. 3
   To alter the branding of stolen cattle; to steal cattle.
4. 4
   To hit the ground behind the ball.

Proper noun

1. 1
   A surname.
2. 2
   A placename: A village in Saskatchewan, Canada.
3. 3
   A placename: An unincorporated community in Indiana, United States.
4. 4
   A placename: An unincorporated community in Nebraska, United States.
5. 5
   A placename: An unincorporated community in Tennessee, United States.
6. 6
   A male given name.
7. 7
   A BR class 47, a class of British diesel locomotive.