眠ねむりこける

ichidan verb, intransitive verb

sleep like a log; sleep deeply

Emphasizes being so deeply asleep that one is unaware of surroundings; often used when someone is hard to wake up.

• 疲つかれていたので、ベッドに入はいるとすぐに眠ねむりこけてしまった。

  I was so tired that I fell into a deep sleep as soon as I got into bed.

• 彼かれはソファで眠ねむりこけていて、電でん話わが鳴なっても気きづかなかった。

  He was sleeping like a log on the sofa and didn't notice the phone ringing.