go to sleep

idiom

1

: to begin sleeping

She lay down on the couch and went (right) to sleep.

Tell the kids it's time to go to sleep.

After the party, I just wanted to go to sleep.

2

of a part of the body (such as a foot or leg) : to be without feeling for a brief time usually because it has been kept in an awkward position for too long

When I started to get up I realized my foot had gone to sleep.