screen-licking 

to look on your opponents screen when playing an intense game of halo.

In the middle of a sniper shootout, "quit screen licking you jerk!", "Howd you know i was screen-licking, that means u were screen licking!"

screen-licking by dizug October 15, 2007

grandma licking the screen 

An expression that doesn’t make sense that means someone is so hard to teach about electronics

“He doesn’t even know how to click the start menu! Dumb as Grandma licking the screen“

grandma licking the screen by Excabur February 25, 2021