Sound made by a machinegun when you pull the bolt back and let it fly forward to chamber the first round
Alternate definition: Sound made by a pump shotgun when you pump it to chamber a round
Second Alternate definition: Sound made by gangster toward an intended victim or warning a potential victim of a machingun or shotgun drive-by shooting.
The last thing that corpse heard was cha-chink....before he got his head all blowed off.
Rufus: I really hate that mule....Cha-chink....BLAM!
The last thing those towel-head terrorists are gonna hear is Cha-chink...