BlocBoy JB Sues Fortnite Creators for Stealing 'Shoot' Dance

BlocBoy JB is following suit with a lot of other artists by filing his own suit against the creators of Fortnite for allegedly stealing a dance he popularized ... TMZ has learned.

BB JB just sued Epic Games -- the company behind Fortnite Battle Royale -- for allegedly ripping off his dance the "Shoot" and throwing it into their game with a different name ... the "Hype" dance.

According to the docs, obtained by TMZ, BlocBoy claims he's the creator of the dance, and that Epic Games didn't get permission to use it in Fortnite. Once again, he claims that while he hadn't registered a copyright on the dance when Fortnite used it ... he says he's in the process of locking it down now.

He's being repped by David L. Hecht and Sandy Lal.

Lots of other rappers and social media figures have filed similar suits -- including one Alfonso Ribeiro, who's got beef with the "Carlton" dance being used in the game, as well as Backpack Kid, who claims the game creators stole his move, "The Floss" -- and they all seem to have the same claim ... we popularized a dance, and therefore its ours.

Good luck, fellas.