Derived from someones sn and the word wonderful. This word is used to piss off a certain someone and be cute at the same time. Normally it is followed by or is a precursor to a verbal attack normally towards the the certain someone and not really the other way around.
Isn't that cyntastic!
A word which is used whenever something great happens. This could also be used to sound sarcastic.
"You drove all that way in the snow? Now THAT'S cyntastic!"