Let's leave him to sleep it off.

咱们让他睡吧，一觉醒来就没事了。

《牛津词典》

You just need to sleep it off, ok?

你只需要睡一觉，忘掉它。

youdao

He said just let you sleep it off.

他说一定要让你睡够。

youdao

Perhaps that is why the sponsors choose Thursday to host their media lunch, so that anyone who takes advantage of too much free wine can sleep it off later without missing much action.

BBC: Crucible diary Day 13

San'ya has aged with its residents, old men with creased faces and missing teeth who squat and smoke on the pavements, drift from bar to bar, or sleep it off in the winter sun on cardboard and plastic matting.

ECONOMIST: Old, down and out in Japan

It can also tell how long you sleep each night, as well as how long it takes you to nod off.

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