be not on Definition in the Cambridge English Dictionary
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Definition of “be not on” - English Dictionary

Definition of "be not on" - British English Dictionary

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be not on

UK Something that is not on is ​unacceptable and should not ​happen: You can't be ​expected to ​work for nothing - it's not on.
(Definition of be not on from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
Translations of “be not on”
in Chinese (Simplified) (表示不能接受、不应该发生)不行,行不通…
in Chinese (Traditional) (表示不能接受、不應該發生)不行,行不通…
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