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English definition of “go out like a light”

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go out like a light

informal
to go to sleep very quickly or to become unconscious very quickly
Translations of “go out like a light”
in Chinese (Traditional) 立即入睡, 馬上失去知覺…
in Chinese (Simplified) 立即入睡, 马上失去知觉…
(Definition of go out like a light from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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