| Duff 1. (n.) Dough or paste. 2. (n.) A stiff flour pudding, boiled in a bag; -- a term used especially by seamen; as, plum duff. Thesaurus Entries arse, bad, beat, behind, bilk, bottom, broken, butt, can, cheat, counterfeit, cozen, defraud, diddle, do, dud, fake, FALSE, fanny, gyp, inoperable, inoperative, overreach, prat, rear, screw, tail, unworkable, useless, worthless |