When a car battery doesn't have enough juice to turn over the engine, but has enough to make the starter produce a very loud
fast clicking noise, which is very close to the sound made by many
sub machine guns.
Will usually scare the living shit out of anyone standing near your
car.
Dude 1: That
guy had a machine
gun starter. It scared the fuck out off me!
Dude
2: Yeah, i gave him a jump later.