Student or Learner
Can someone please tell me what people mean when they say "Bring it on." and in what types of situations it can be said?
Banderas has explained it well, especially highlighting the competitive nature of the situations in which it's used. I would even suggest that it's often combative too, indicating a willingness to fight and a lack of any fear of the one to whom it is being said. Certainly, as banderas said, you'll hear it a lot in sporting situations, as well as in fights, both sporting and not so sporting.
Can it also be said in reply to abuses? I mean if someone is trying insult or abuse one, can s/he say "Bring it on!"?