B2idiominformalhealthIELTS-friendly
out like a light
USUK
asleep very quickly, almost as soon as you lie down
Usually with 'be' or 'go': 'I went out like a light'. 'Sleep like a log' is about how deeply you sleep, this one about how fast.
In context
After the long hike, I was out like a light by nine o'clock.
The baby was out like a light as soon as the car started moving.
More idioms about health
- a clean bill of healtha doctor's statement, after an examination, that someone is healthy
- a new lease of lifenew energy, or a chance to be active or useful again
- a ripe old agea very old age, reached in good health
- a second windnew energy that lets you continue after you felt too tired
- a shadow of your former selfmuch weaker, thinner or less impressive than before