What do you mean by staying up late?

1, stay up late, don't have the courage to end the day; Lying in bed, you have no courage to start a new day.

I stayed up late to do my homework last night. In class this morning, my eyelids sank involuntarily like lead. Looking at the teacher's vague figure, I gradually bent down and fell on the desk.

I don't like staying up late either. I just want someone I like to tell me to go to bed early and have a good sleep.

I haven't stayed up for a long time, and I can't stand the emptiness. Sleep is the best comfort.

I told others not to stay up late, but I slept very late.