First thing out someone's mouth when shit is about to go down. Usually shouted when a fight breaks out. Guaranteed to see at least one titty and a KO. Originates from worldstarhiphop.com
(a popular website that showcases upcoming rappers, latest cultural/world news, butt-nekkid women, many fights, etc.)
Girl 1: FUCK YOU BITCH!
Girl 2: *Throws punch*
Guy 1: Oh shit, WORLDSTAR!!!
Girl 1: *Titty flops out*
Girl 2's boyfriend: *KO's the boyfriend of girl 1 with a nasty left hook*
A World Star is a person who is becoming celebrated, distinguished or popular in arts of entertainment. These are arts such as music, television, production, writing, marketing, modeling or any profession that benefits from mass exposure or popularity. The key to being a World Star is having an unbridled passion and a blind will to succeed in your career choice.
All of that hard work is the main reason he is a world star today.