go out like a light

US /ɡoʊ aʊt laɪk ə laɪt/
UK /ɡoʊ aʊt laɪk ə laɪt/
"go out like a light" picture
1.

很快睡着, 倒头就睡

to fall asleep very quickly or suddenly

:
After working all day, he went out like a light as soon as his head hit the pillow.
工作了一整天后,他一沾枕头就睡着了
The baby was so tired that she went out like a light during her feeding.
宝宝太累了,喂奶的时候就睡着了
2.

立刻昏过去, 突然失去知觉

to lose consciousness suddenly

:
The boxer took a heavy punch and went out like a light.
拳击手挨了一记重拳,立刻昏了过去
The sudden drop in blood pressure made her go out like a light.
血压突然下降让她立刻昏了过去