When something is considerably classy or nice.

A combination of fantastic and class.
I got a new car to replace my old one that died last month, it's really classtastic.

Ever since she got that new job she's been dressing really classtastic
by ~cat~ August 15, 2009
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1. Used to describe something that is extremely classy, or in good taste.

2. Can also be used sarcastically to deride those who are certainly not classy.
1. Did you see the new vest and tie combo I picked up for the formal?
Yeah, man. That stuff is classtastic!

2. Steve and Vicki were totally hooking up in the bathroom at formal. She was all over his new vest and tie combo.
Really? Classtastic.
by Fergsauce October 27, 2010
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