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22.
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.
by Dr fantastic September 11, 2014
 
23.
The opposite of fantastic. Bad, undesirable, unpleasant, displeasing, or abhorrent.
That restaurant is asstastic.
by Donnie Ballgame May 21, 2009
 
24.
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!
by HugeBreasticle March 18, 2005
 
25.
A fine fine looking ass
This girl was so asstastic she was worthy of a tossed salad
by onedudeman July 16, 2006
 
26.
Used to decribe a chick with a big ass. Usually in a good way, but its subjecive, depending on the pronouns used.
Damn, that chick is Ass-tastic! I wanna hit that!

or

Damn, that nasty chick is Ass-tastic, someone call Jared from the subway commercials.
by Solid July 13, 2005
 
27.
Slang. A word used to define a really awsome or great time.
Man, that was totally Asstastic!
by Kiamors August 28, 2003
 
28.
Ghetto ass on a white girl!
That white girl right thurr is ASSTASTIC!
by Brooke January 20, 2004