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English definition of “that will never do!”

that will never do!

old-fashioned
used to say that a situation is wrong and unacceptable: "The dinner was excellent except that they served red wine with the chicken." "Dear me! That will never do!"Unsuitable and unacceptable
(Definition of that will never do! from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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Translations of “that will never do!”

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