What is "jigawatt"

n. (eye dialect of gigawatt English)

A jigawatt is a fictional measurement of power. It is used in the Back to the Future movies and represents an extremely high power (some say it equals one gigawatt, or 1 billion watts). About 1.21 Jigawatts is required to power the Flux capacitor to travel back and forward through time. Jigawatts are often referred to in Internet forums in order to make fun of someone's electrical knowledge.

The film's writers Robert Zemeckis and Bob Gale intended for the power to be gigawatts, but heard it pronounced as "jigawatt" and as such, spelled and said it that way in the script, not learning the real pronunciation until after the film had been shot.