beauty sleep
US /ˈbjuː.ti ˌsliːp/
UK /ˈbjuː.ti ˌsliːp/
1.
sleep taken before midnight, regarded as especially refreshing and beneficial to one's appearance
:
•
I need to get my beauty sleep if I want to look fresh for the presentation tomorrow.
•
She always makes sure to get her eight hours of beauty sleep.