Top Definition
A word used to describe endless radness and coolness.
"Yes! I got an A on the test. I am so radastastic."
or
"Lily, you are so radatastic."
by radVanessArad September 21, 2007
1 more definition
A word used to describe endless radness and coolness.
"Yes! I got an A on the test. I am so radastastic."
or
"Lily, you are so radatastic."
by radVanessarad September 21, 2007

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