Incorrect pronounciation of the term gigawatt, said in the Back to the Future movie.

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Although sometimes deemed incorrect, "Jiga" is the correct, if uncommon, pronunciation of the prefix giga-.

Seeming to come out of nowhere, a jigowatt is the feeling of a what seems like a thousand bolts of energy shooting up the spine, wreaking havoc on your nervous system, completely disabling you from doing anything other than jerking your body in a violent shiver for about 3 to 5 seconds.