nod off

US /nɑːd ɑːf/
UK /nɑːd ɑːf/
"nod off" picture
1.

打瞌睡, 睡著

to fall asleep, especially unintentionally

:
He kept nodding off during the boring lecture.
他在無聊的講座中不停地打瞌睡
I was so tired, I almost nodded off at my desk.
我太累了,差點在辦公桌前睡著