When can I use "bring it on"?

Native speaker’s answer
Rebecca
"Bring it on" is an informal expression used when you wish to challenge someone. You can use it in a variety of situations - for example, when you are playing a friendly game against others, participating in a contest or competition, or when you are anticipating some sort of future challenge or obstacle. Ex: There's no way you'll beat us. Bring it on! Ex: Bring it on! We're going to whoop your team. Ex: I'm ready for Monday. Bring it on!