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A common 1980s-era mispronounciation of gigawatt, made infamous by Robert Zemeckis's "Back to the Future" trilogy.
jiggawatt by Ross M October 2, 2004

jigawatt 

Unit of power used by a Flux-capicitor.
"1.21 Jigawatts ! The only thing that can produce that kind of energy is.. A bolt of lightning."
jigawatt by Woody Two Guns December 31, 2007

needs more jiggawatts 

A phrase from the film Back to the Future. It was used in the movie by the Doc to voice concern that something needs to be more powerful.

Today, we use the same phrase to explain that things need to be more powerful or better.
Jon: Dude, my MP3 player can't hold anymore songs. It's only 256MB.

Mike: Needs more jiggawatts.

____

Sam: This computer is too slow.

Judy: Needs more jiggawatts.

____

Mary: I bought a used Geo Metro. Needs more jiggawatts.

Beth: Hells yea.

____

Sam: How do you like these wings? I made them extra spicy.

Tony: Needs more jiggawatts!

jigawatt 

Gigawatt
See gigawatts.
"What the hell is a jigawatt!?"
jigawatt by Joshua J. Slone July 27, 2003

jiggawatts 

When a girls fat ass jiggles/ripples when she walks, twerks, gets slapped, etc.
john: "look at that girl walking"

tim: " damnnn, that girl got jiggawatts when she walks"
jiggawatts by Braeden.S December 15, 2019

jigawatt 

Tuna's time machine needed 1.21 jigawatts to successfully make it into the past.
jigawatt by Tuna October 27, 2003