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Something that is spectacular. see fantasic
A jumbo-dog from Boo Boo's is Fantabulous
by Tom Donnan November 21, 2003
Fantastic and Fabulous combined....a really great thing!
That dress is fantabulous.
by Maggie April 26, 2004
When something is good beyond good beyond good, and all other positive explanations have been used. See fantasic and fabulous.
I'm feeling fantabulous today!
by Lynz March 21, 2004
something that is absolutly out of this world, a mix of fabulous and fantastic
god, that was fantabulous
by Gigglefairy January 02, 2004
Fantastick, to a higher degree; better than average; great with more emphasis.
I had a fantabulous day, because that hot guy asked me out!
by Kimmy November 13, 2003
A mix of fabulous and fanstic, used to express extreme appreciation and/or happiness. Most commonly used by over zealous flamboyant males turning ugly girls into beauty pageant queens in shows such as MADE.

"Those open-toed shoes are so much more fantabulous than those ugly hooker heels"
by BelleEpoque August 24, 2006
For when you can't decide whether to use "fabulous" or "fantastic". Just use them both. Why not? They mean the same thing.
Used in the same way as "fabulous" or "fantastic", only twice as excitedly.
"Try the bacon cheeseburger, I swear it's FANTABULOUS!"

"Geez, Karen, your hair looks FANTABULOUS today!"
by Caitlin March 25, 2005