Screenhooker

Someone who glances at your side of the screen when playing an FPS (First person shooter) Such as Call of duty, Medal of honor, and Time splitters, Using that advantage against you whenever you go around corners, use special abilities, or other hidden places being revealed, tipping the tide of the game into their own favor.

Joe is a screenhooker, because he had looked at Ethan's screen to snipe him out.

Screenhooker by KodiakWolf January 1, 2010

screenlooker 

A screenlooker is anyone who on a multiplayer shooter looks at another player's screen to identify their location and frag them as many times as possible. An example game is Halo 2.

"Dude how the freak did you just kill me?"
"I'm just really good."
"Damn screenlooker."

screenlooker by ColdVantage January 4, 2005

screenlooker 

One who looks at screens, often too much.

'Tim looks at screens all day, he's a screenlooker!'

screenlooker by Wielder of the Truth May 25, 2017

Screenshooter 

A gay little faggot who likes taking screen shots of somebodies activity on a computer while using the screen shots as material used for masturbation and blackmail. A very devious obsessed individual who has no life. A chronic masturbater who needs they're head bashed in with a baseball bat.

Hi screenshooter, how is it going? You're still doing the same thing you were doing 2 years ago? Cool.

Screenshooter by HOO AM EYE!!!! April 6, 2010