When something is really mean and sassy, but its really funny.
Kelly: Your moms so fat she's fat.
Kenz: That was sasstastic!!!!
by K-Dog & T-Monz July 19, 2008
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Having sassily incomprehensible levels of sassy sasstastical sass overloads; usually considered too fantastically sassy for any white person to achieve.

Noun: Sasstastile
Verb: Sasstastically
Adjective: Sasstastical
Synonyms: Sassy, sass
Antonyms: 12vie, white girl, old people
Me: Mum stop trying to be funny! you can never make jokes.
Mum: I made you.
By-passer: I can't even handle how sasstastical you are!
by smeheh January 15, 2015
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