screen cheat

1. The act of looking at other players' parts of the screen when playing a multiplayer game, often a first-person shooter, where said sections of the screen are supposed to be private knowledge, and give the screen cheater an unfair advantage.
2. Someone who screen cheats (like my stepbrother).

when playing a multiplayer game on one screen, cheating scum look at the other persons side of the screen to find out wot gun they have or where they are

While playing a multiplayer FPS games, you look at the other persons screen to see where they are and you use that advantage to kill them