What does it mean to get in someone’s face? It can mean a number of things. “Get out of my face” is a favorite phrase of disrespectful youth these days, and you hear it a lot in schools. What getting in someone’s face usually means is to confront them. This is the figurative meaning to it. There is also the literal meaning. While both can be provoking, violating someone’s personal space be quite dangerous.
It does not only provoke them, but also makes you a prime target for sucker punches. People will not hesitate to sucker punch these days, if you get in such a position, you should be ready for anything.