sleep a wink

beauty sleep

Originally, sleep taken before midnight, on the belief that early sleep hours conduce to beauty and health; now (chiefly humorous), sleep at any time needed by one to stay beautiful; (countable) an instance of such sleep.

big sleep

Death.

cry oneself to sleep

To cry until or to fall asleep.

eat, breathe, and sleep

To devote one's time obsessively to.

eternal sleep

Death

fox sleep

Feigned sleep while actually alert.

go to sleep

To be affected by paresthesia; to go numb.

in the wink of an eye

instantaneously, extremely quickly