This term is applied when playing first-person shooter video games, such as Halo,
Call of Duty, or another top selling video game title, more specifically
Call of Duty.
When someone is using a sniper rifle, and takes longer than
approximately 1 second looking down the scope.
A more extreme example is when watching a kill-cam, the player is scoped in from beginning to end, or the player is looking through the scope for the majority or the kill cam.
Antonym: Quickscope