It is a combination of the word "fad" and "fantastic." Used in the sarcastic tense when some new fad pops up.
Do you wear eyeliner?

Sure

Are you a straight male?

Yes

How fadastic.
by kevin December 06, 2004

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×