that does not work as it should; false or incorrect 无用的；失灵的；出故障的 Word Originadjective late 18th cent. (denoting something worthless): of unknown origin.
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a person’s bottom 屁股 Are you just going to sit around on your duff all day? 你就打算整天无所事事吗？
Word Originnoun mid 19th cent.: of unknown origin.
duff
verbVerb Forms
Phrasal Verbs| present simple I / you / we / they duff | |
| he / she / it duffs | |
| past simple duffed | |
| past participle duffed | |
| -ing form duffing |
duff
Broken, torn or damaged: broken, battered, faulty...
Not effective or useful and not working correctly: useless, ineffective, inefficient...
To attack a person or object: attack, assault, set on...
To hit a person: hit, smack, bludgeon...
Cakes and biscuits: baking sheet, Beaver Tail, biscuit...
The part of the body you sit on: bottom, backside, behind...
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