duff
[verb]
Synonyms: cheat, beat, bilk, cozen, defraud, diddle, do, gyp, overreach, screw
[noun]
Synonyms: buttocks, *arse, behind, bottom, *butt, can, fanny, *prat, rear, tail

[TahlilGaran] English Synonym Dictionary ▲

I. duff¹ /dʌf/ noun [countable]
[Date: 1800-1900; Origin: dough]
American English informal the part of your body that you sit on Synonym : bottom:
Get off your duff (=stop sitting or stop being lazy) and help me!

[TahlilGaran] Dictionary of Contemporary English ▲

II. duff² adjective British English informal
[Date: 1800-1900; Origin: Perhaps from duffer]
bad or useless

[TahlilGaran] Dictionary of Contemporary English ▲

III. duff³ verb
duff somebody ↔ up phrasal verb British English informal
to fight someone and injure them

[TahlilGaran] Dictionary of Contemporary English ▲