Glock finger is a way to fire your gun faster than normal in a first person shooter (like Call of Duty 4/ Call of Duty: WaW) via fast finger movement not a modded controller.
Kid 1: "AHHH that guy is shooting his pistol REALLY fast! he must have a modded controller." Kid 2: "Nope! Respect the Glock Finger, bitch!!"
by o Bird o June 10, 2009