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1.
something thats really fantastic. merges the words damn and fantastic. as if something was damn fantastic.
today was just fandamntastic!
by the wind is changing September 01, 2005
 
2.
amazing, great, spiffing.
This pizza is fandamntastic. this website is fandamntastic. your face is fandamntastic. It is a fandamntastic day today.
by Mark Buttle November 12, 2006