Cách sử dụng
"Keep your hair on" is an English expression used to tell someone to calm down, relax or not get angry. You can use it when someone is getting agitated or upset about something, and you want to tell them to stay calm and not get too worked up. It's a gentle way of reminding someone to stay composed and not lose their temper. For example, if your friend is getting angry because they missed the bus, you can say to them, "Hey, keep your hair on, there will be another bus coming soon."