1. What are the popular online words? Break your head? Is it an English word? Fight? China people have empty ears. Fight? What does this mean? Fight, fight? . Usually refers to the live impromptu performance, and the onlookers judge their dancing skills/rap ability.
This is a common word in rap and hip-hop culture, and it is synonymous with PK.
3. cite an example: don't stand aside and shout, come and break up with me.