Top Definition
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
1 more definition
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

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