go/be out like a lightinformalSLEEP to go to sleep very quickly because you are very tired 〔因很疲倦而〕很快入睡 I went straight to bed and went out like a light. 我直接上了床，倒头就睡着了。
go/be out like a light• A minute later he went out like a light.• Something hit me on the back of the head, here, and I went out like a light.• I went out like a light.• Either it was the brandy or it was the heat, but she went out like a light.• She was out like a light, as soon as we put her in bed.
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