an adjective describing a noun that imploys ingenious dialogue and/or content featuring one or more of the major areas of mathematic inquiry: arithmetic, number theory, geometry, probability, statistics, ect.
The play "Eureka" featuring Einstein, Ada Lovelace, Pythagoras, and Pascal was truly mathtastic.

In "Stranger than Fiction", Harold Crick is mathtastic.
by KSignell February 6, 2010
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A term made up by a math teacher to mean that a person did so well on a project, test, or quiz, that they were absolutely amazing. Only given for 100% and up.
Dude!
What?
I got mathtastic on my test the other day!
Oh wow man, i got a 45 =(
by BoboJobo February 7, 2010
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