brains jump out the top like jack in the box

(v) The act of shooting somebody in the head. Popularized by the 50 cent song 'Heat'

Man, I was playing Gears of War and made somebody's brains jump out the top like jack in the box.

by DieLawn September 06, 2007

brain jump

When your brain shuts down for a split second and when it starts again you yell "Brain jump!"

Hoon(staring in space): "Brain jump!"
Everyone else: (Oblivious to him talking)

by dirty_dog_farmer February 04, 2015