Means War!' is an expression used to describe a situation in which two people or groups are in conflict with each other. It is often used to describe a situation in which two people or groups are fighting for the same thing and neither side is willing to back down. The phrase 'Means War!' is often used in movies and television shows to describe a situation in which two people or groups are engaged in a bitter conflict with each other. It can also be used in real life to describe a situation in which two people or groups are in a state of intense competition or hostility towards each other.