asstastic 

something that is fantastic (usually referring towards the buttox area).

That girl is lookin' asstastic today!

asstastic by hallelujiah March 22, 2010

asstastic 

Lame; weak; inferior.

That game was asstastic; damn cheaters.

asstastic by Anonymous L-Value October 11, 2002

Asstastic 

A modified form of "fantastic" that injects the word "ass" to reverse the meaning. Asstastic refers to something that sucks or is of poor quality.

Davo: That pizza was asstastic!
Luis: Yeah, holmes, it tasted like bum!

Asstastic by HugeBreasticle March 18, 2005

Asstastic 

A word used to describe a girl with such a breathtaking, beautiful booty that it becomes that girls defining factor.

That girl is asstastic bro.

Asstastic by Dr fantastic September 11, 2014

asstastic 

a combination of ass and fantastic. for when fantastic just doesn't cut it.

Damn that '63 Fender Strat is asstastic!

asstastic by andrew January 12, 2003

asstastic 

A fine fine looking ass

This girl was so asstastic she was worthy of a tossed salad

asstastic by onedudeman July 16, 2006

Asstastic 

A fantastic (or extreme) amount of being an ass

"Wow, you are really being asstastic today!"

Asstastic by Courtster May 3, 2008