Screen Hawk 

When you're playing a splitscreen game and look on your friend's screen to find him in the game.

Guy 1: "Hah, saw you go into that room."

Guy 2: "Stop screen hawking me!"

Screen Hawk by clericUD April 17, 2019

Screen Hawking

When a co-worker, or nosy individual, walks behind your computer/workstation, staring at your screen as they pass, to try and figure out what you're doing.

"I was working on my month end close, and Socially Akward Penguin kept walking behind me, screen hawking and mouth breathing"

Screen Hawking by Screen Hawked January 12, 2012

Screenhack 

To sneak a peak at an opponent's screen, when competing in a multi-player, online environment, e.g. Call of Duty, in order to find out where they are so you can go shoot them. Screenhackers are the subject of much finger-pointing and deriding upon discovery.

John: "You're looking at my screen you cheating son of a wh*re"

Fred: "No I didn't, I was just checking my watch"

John: "I so caught you screenhacking!"

Screenhack by Pukezilla January 8, 2011