kyak

An individual who displays incredible talent in video games who has a complete understanding of the game and its mechanics.

or

An individual who displays his incredible talent against the opponent in online multiplayer games.

Brett: "Chaa bruh, did you see Shroud? He is so kyak"
Chad: "Yaas dude, he went so kyak over the other team"
Brett: "Savage"
Chad: "Lit"