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3. be out like a light

be out like a light

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be out like a light

1. To be sleeping very soundly. Don't worry, the vacuum won't wake him—he's out like a light. I didn't even hear you come in last night—I was so tired that I was out like a light as soon as my head hit the pillow.

2. To fall asleep quickly. I didn't even hear you come in last night—I was so tired that I was out like a light as soon as my head hit the pillow.

3. slang To be very drunk. Do you remember last night at the bar at all? You were out like a light!

See also: light, like, out

be/go out like a light

  (informal)

to go to sleep very quickly I was out like a light after all that fresh air.

See also: light, like, out