Cách sử dụng
The expression "lighten up" means to relax, not take things too seriously, or to be less uptight.It can be used in situations when someone is being overly serious, anxious, or uptight about something and needs to be reminded to relax and not worry so much. For example, if someone is getting very stressed about a small mistake, you might say "Hey, it's not a big deal, just lighten up." This can help them see that they don't need to be so anxious and can relax a bit.