expression, godan verb (-ru)
sleep like a log; sleep like a baby
Idiomatic expression meaning to sleep very deeply and soundly, without waking easily.
昨日は疲れていたので、泥のように眠った。
I was so tired yesterday that I slept like a log.
赤ちゃんはミルクを飲んだ後、泥のように眠っている。
After drinking milk, the baby is sleeping like a log.