To pull an all-nighter
to stay up all night to either work or party.
To not sleep a wink
to not be able to fall asleep
To sleep in
to sleep past the time you usually wake up
To sleep like a log/baby/rock
when you sleep so well, you sleep through the night without waking up
To be fast asleep / sound asleep
when someone is in a deep sleep and it’s difficult to wake up
To lose sleep over something
when you’re up all night worrying about something
to be out like a light
to fall asleep immediately
to sleep it off
when you need rest because you’ve had too much to drink or you’re feeling unwell
to be able to do something in your sleep / to do something with your eyes closed
to be able to do something very easily
to sleep on it
to postpone making an important decision to give your more time to think about it
to put someone to sleep
when someone or something is so boring, it makes you want to fall asleep
to hit the hay/sack
to go to bed
to let sleeping dogs lie
to leave a situation alone so that you don’t make it worse
to sleep with one eye open
to sleep lightly or even stay awake because you’re on high alert
