sleep like a log

Idioms  

1. Also, sleep like a top. Sleep very soundly, as in I slept like a log, or She said she slept like a top. Both of these similes transfer the immobility of an object to that of a person who is sound asleep (since a top spinning quickly looks immobile). The first dates from the late 1600s; the variant is newer.

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Example Sentences

“If you look at little kids, they run around all day, and they sleep like a log at night,” says Erik Musiek, a neurologist and a director of the Center on Biological Rhythms and Sleep at Washington University School of Medicine in St. Louis.

From New York Times

"Before the lockdown, I would sleep like a log. But now it's the opposite," the 26-year-old tells Newsbeat.

From BBC

Then I go back to New Zealand, watch the sunset, sleep like a log, and stop drinking half a dozen cups of a coffee a day.

From Nature

And I always sleep like a log!

From The Guardian

Fosterdyke went to his cabin, to sleep like a log.

From Project Gutenberg