and that's flat! Definition in the Cambridge English Dictionary
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Definition of “and that's flat!” - English Dictionary

Definition of "and that's flat!" - British English Dictionary

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and that's flat!

UK informal used to ​tell someone that the ​decision you have just ​announced will not ​changeeven if they ​try to ​persuade you to ​change it: I'm not coming, and that's flat!
(Definition of and that's flat! from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
Translations of “and that's flat!”
in Chinese (Simplified) 没有商量的余地,就这么定了…
in Chinese (Traditional) 沒有商量的餘地,就這麼定了…
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