sleep on

US /sliːp ɑːn/
UK /sliːp ɑːn/
"sleep on" picture
1.

一晩考える, 熟考する

to delay making a decision about something important until the next day, so that you have more time to think about it

:
I'll sleep on it and let you know my decision tomorrow.
一晩考えて、明日決断をお知らせします。
It's a big decision, so take your time and sleep on it.
大きな決断だから、時間をかけて一晩考えてみて。