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English definition of “I should be so lucky!”

I should be so lucky!

informal
said when what you want is extremely unlikely to happen: "You might win first prize." "I should be so lucky."InterjectionsSounds used as interjectionsImpossible and improbable
(Definition of I should be so lucky! from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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Translations of “I should be so lucky!”

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