Definition
to retire for the night
去上床睡覺
I’m really tired tonight, so I plan to sack out early.
我今晚真的很累，所以我打算早點上床睡覺。
He works late every day and then just sacks out.
他每天都工作到很晚，然後就直接去睡覺了。
After watching the movie, we all felt sleepy, so we decided to sack out.
看完電影後，我們都覺得很睏，所以決定去睡覺。