1.) An exclamation, usually one of amazement used when just saying wow won't do.

2.) A common reaction to a trip to Fatburger.

1) Is that a lion that's attacking your neighbor? Fatwow!

2.) This burger is amazing. Fatwow. Seriously. Fatwow.
by M.G. August 27, 2007

5 Words Related to fatwow

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