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adj. An exclamation of extreme joy. It can also be used in a sarcastic sense to describe utter dismay.
I just won a fanfuckintabulous Carribbean vacation.
You're three weeks late?!? That's fanfuckingtabulous.
by zwicks September 29, 2004
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Having the absolute most amazing time that one could ever think about with all their friends, mud, trucks, quads, and any other redneckified piece of equipment, motorized or not.

One could say it's Heaven on earth with GOLD in it. Just the absolute best place with the greatest people, FRCC!
The 2016 FRCC is going to be Fanfuckintabulous.
by Slick75 September 17, 2016
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