duff

adj

Etymology: Uncertain; probably related to Proto-Indo-European *dʰewbʰ- (“to whisk, smoke, darken, obscure”).

1. Worthless; not working properly, defective.

   “Why do I always get a shopping trolley with duff wheels?”

   “From its surface, he insisted, plain food became ambrosia, water nectar, and the duffest dope would blow your mind.”

name

Etymology: From the Irish and Scottish Gaelic surname, from dubh (“dark”).

1. A surname.
2. A placename
3. A placename
4. A placename
5. A placename
6. A male given name.
7. A BR class 47, a class of British diesel locomotive.

noun

1. Acronym of dumb/designated ugly fat friend, an attractive woman's less attractive friend.

verb

Etymology: Originally thieves' slang; probably a back-formation from duffer.

1. To disguise something to make it look new.
2. To sell spurious goods, often under pretence of their being stolen or smuggled.

   “A person once taken-in by smuggled handkerchiefs, or anything, won’t deal with a hawker again, even though there’s no deception. But ‘duffing,’ and all that is going down fast, and I wish it was gone altogether.”

3. To alter the branding of stolen cattle; to steal cattle.
4. To hit the ground behind the ball.