sleep outTo sleep at one's own home, not at one's place of employment
[TahlilGaran] Dictionary of Contemporary English ▲
sleep out v. 1. To sleep outdoors.
The Scouts plan to sleep out next Saturday. 2. To go home at night instead of sleeping at the place where you work.
Mrs. Jones' maid sleeps in, but her cook sleeps out. [TahlilGaran] English Idioms Dictionary ▲