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3.
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.
I was standing on my porch today when out of nowhere, I had a jigowatt! It was no ordinary shiver! It was like an earthquake went up my spine!
by zazu August 14, 2005
 
1.
Incorrect pronounciation of the term gigawatt, said in the Back to the Future movie.
1.21 Jigowatts! 1.21 Jigowatts!
by Billy Givens March 09, 2005
 
2.
Although sometimes deemed incorrect, "Jiga" is the correct, if uncommon, pronunciation of the prefix giga-.
"1.21 Jigowatts?" Doc Brown
by HornPlayerCasey February 25, 2009