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English definition of “forget it”

forget it

informal
used to tell someone that what they want is impossible: "I'd like to take a week's holiday." "Forget it, we're way too busy."Forgetting and forgetfulness B2 used to tell someone that something is not important and not to worry about it: "I'm so sorry about that cup." "Oh, forget it - I've got plenty."Expressions meaning 'it isn't important to me'
(Definition of forget it from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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