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.
by HugeBreasticle March 18, 2005
Get the Asstastic mug.A word used to describe a girl with such a breathtaking, beautiful booty that it becomes that girls defining factor.
by Dr fantastic September 11, 2014
Get the Asstastic mug.by Gilbert Godfrey December 8, 2004
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Get the Asstastic mug.by Shady Toni December 19, 2008
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Get the Asstastic mug.When a guy/girl has a glorious backside to the point it makes you stop whatever you are doing just to watch it sway away
I was walking through the mall when through my peripheral I spotted this asstastic chick swaying away and wads mesmerized into a coma!
by Nomolos69 September 7, 2010
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