1.catch some sleep 睡会儿觉
I'm tired. I'm gonna go catch some sleep.
2.I'll sleep on it. 我会好好想想的
Um, I think I need more time. I'll sleep on it.
3.sleep it off 你睡一觉就没事了
Don't worry. You'll sleep it off.
4. sleep like a log / sleep like a top
Usually, I sleep like a log.
5. sleep with sb. / sleep together
Tom slept with Sarah together.
Tom slept with Sarah last night.
6. Sleep tight. 睡个好觉
I'm gonna go home. Good night and sleep tight!