a night owl
Meaning: You're a night owl if you like to stay up and do things late at night.
- She's always been a night owl. Even when she was a student she'd study late at night and get up as late as possible the next day.
- I don't know why I'm a night owl. I just seem more alert at night, and even if I go to bed early I can't get to sleep till about 3 in the morning.
Cassandra is a night owl, so she doesn't usually get up until about