screen peeking 

the act of looking at the other 3 players screens t see where they are and what they are doing in an FPS, often essential to winning a game of goldeneye.

dude, no wonder you lost, you didnt use screen peeking.

screen peeking by jim December 28, 2005

screen peeping

Looking at a friends screen while playing a split-screen game with them.

Person 1: "Dude! Stop screen peeping!"
Person 2: "I wasn't screen peeping."
Person 1: "Yeah you were. How else could you know that that was my hiding spot?"

screen peeping by ih8crackas April 28, 2010