Is usually made by filling a shot glass with ice. Add a straw before filling with liquor.
Layer one: Chambord (raspberry liquor)
Layer two: Vodka
Layer three: Club soda
But at the bar that I work at, we also make zipperheads with the following layers:
Layer one: Raz-a-taz (raspberry Schnapps)
Layer two: Raspberry Stoli
Layer three: Sprite
It is said to have been coined during the Korean war by frontline troops whom had run over enemy troops in jeeps.
The soldiers claimed that the tire tracks from the jeeps left a pattern resembling that of a closed zipper along the corpse.
Hey Zipper Head, learn how to drive.
It is often shortened to zip, though zip as a racial pejorative may have separate origins of its own