fantasterastic 

Exceeding all means of greatness.

Wow, that movie was fantasterastic!

fantasterastic by Bubba Lubba August 14, 2004

fantastarastic 

Supremely great. I mean like, this is the pinnacle of greatness.

Holy crap, this soup is fantastarastic, Maude!

fantastarastic by Austin A. June 2, 2003

fantastanastic 

greater than fantastic ; the best you can get

OhMyGawd that kickflip sean did was friggin fantastanastic

fantastanastic by Caysha August 17, 2008