A kill in FPS games like Modern Warfare 2, where the person using a sniper rifle (like the Intervention, M40A3, or R700) zooms in with the regular scope barely enough for the cross-hairs inside the scope to become visible or just before resulting in a Dark Scope and then firing the weapon resulting in a kill. Thus the Quick-Scope.
Perfect MW2 Class for this: Intervention+FMJ, Sleight of Hand Pro, Stopping Power Pro, Ninja Pro (cause noobs need steady aim).
OMG! Did you see that!?!?! I just 360 quick-scoped OpTic DTreats across the map on Overgrown!