duffing

Verb

duff (third-person singular simple present duffs, present participle duffing, simple past and past participle duffed)

1. (obsolete, slang) To disguise something to make it look new.
2. (obsolete, slang) 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.1851, Henry Mayhew, London Labour and the London Poor, published 1861
3. (Australia) To alter the branding of stolen cattle; to steal cattle.
4. (US) To hit the ground behind the ball.

See all 23 meanings of duff