Nyjah Huston jumped a guy at a house party and beat the man's face so viciously he needed surgery to fix a broken nose ... this according to a new lawsuit.
According to legal docs, obtained by TMZ, Ryan Sheehy claims he was at a February 12, 2017 house party in Los Angeles when Nyjah jumped him and started beating the hell outta his face.
In the docs, Ryan claims the pro skateboarder's attack left him with a broken nose, which required reconstructive surgery, and a cut above his left eye, which required stitches and left a noticeable disfigurement. As a result of the injuries, Ryan claims he suffered immense pain and was forced to miss work.
We broke the story ... the L.A. County D.A. charged Nyjah with felony battery after the alleged fight.
Ryan is going after Nyjah for damages.
Despite the felony charge and lawsuit, Nyjah has still been skating and just claimed his fifth career Street League Skateboarding World Championship title.