duff

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Related to duffs: Duffs device

duff

Slang the rump or buttocks

Duff

 

(Russian, shtyb), particles of hard coal less than 6 mm in size.

References in classic literature ?
On a table in the corridor lay the dead body of Burton Duff.
Being desired to sit down, he put his hat on the floor, and taking a chair, motioned to Duff to do the same.
Blathers and Duff looked very knowing meanwhile, and occasionally exchanged a nod.