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English definition of “knock/throw sb for a loop”

knock/throw sb for a loop

US informal
If something that happens knocks you for a loop, it upsets or confuses you because you do not expect it: He knocked me for a loop when he said he was quitting his job.
(Definition of knock/throw sb for a loop from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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Translations of “knock/throw sb for a loop”

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