WORLD STAR is a running gag of Nova.
WORLD STAR first originated from one of Nova's H1Z1 streams where a player was shouting "World Star" when other players started fighting. James dubbed him "Hype-Man".
The Hype-Man's identity was revealed to be Twitch streamer Ks1_Tv. Nova and Ks1 both follow each other on Twitter and the two met a second time on H1Z1 where Nova killed him, but said that they should play together sometime.
- WORLD STAR is a reference to WorldStarHipHop.com, a website that contains many fight videos where people shout "world star" in them.