Cách sử dụng
The expression "stay up" means to remain awake and not go to bed. You can use it when talking about staying awake late at night, working or studying overnight, or enjoying a party or event that goes on late into the night. For example, "I stayed up all night finishing my homework" or "Let's stay up and watch a movie together." It's important to note that "stay up" is an informal expression and would not be used in formal situations.