The idiomatic expression "to sleep over" means to spend the night away from home, typically at someone else's residence. It can also refer to delaying a decision or action until later.
Sentences with «to sleep over»
While I still consider it a good practice I don't lose sleep over not doing it. (mechanics.stackexchange.com)
The pet sitter may come several times per day and they may or may not sleep over at the house and rates will apply accordingly. (houstonpettalk.com)
So if you are getting only 4 - 6 hours of sleep over time you're cheating your body from major gains from your hard work. (fitbodyhq.com)