Stands for "Game/REJECTED". Commonly used to describe arrogant people who have no skills to survive in a game. Conclusively, making them quit the game forever.
Based on text communication. If verbally pronounced, it would just be said as "Game Rejected!"
*Final Score: Blue Team- 100 / Red Team- 3*
Blue Player: Game/R - Don't come back!
Red Player: S**** You then!
*Red Player Quits*