Something that Sgt. Foley will say very often in the mission SSDD which is your only day of actual training in the game: Call of Duty: Modern Warfare 2. Perhaps the most useful feature in a game with such overpowered weapons.
This phrase quickly became a meme along with "Rameriez! X that Y with your Z"
Foley: You've got to pick your targets by aiming deliberately down your sights from a stable stance!
Foley: That's all there is to it. You want your targets to go down, you gotta aim down your sights.
Something Call Of Duty fanboys love to do.
Dude i played CS:GO today and i didn't know how to aim down sights there! HELP!