B1idiominformaleveryday
sleep tight
USUK
a friendly way to say goodnight and wish someone a good sleep
Said to family, children or close friends at bedtime. Something you say to someone, so it doesn't fit an exam answer.
In context
Goodnight, sweetheart. Sleep tight, and I'll see you in the morning.
My mum still texts me 'sleep tight' every night, even though I'm thirty.
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