Somebody who is all out awesome and portrays a certain image that is accepted through certain groups, cults; etc.
"I love you! You're so radtastical!."
by Samantha Sadler March 6, 2006
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Fantastically Rad.

To exhibit behavior, actions, or state of being in a nature that intertwines traits that would be considered 'fantastical' and 'rad' simultaneously.
The artist's imaginative creations made under the influence of psychedelics were so astonishingly mind blowing, they could only b described as radtastical.

The steam punk space skate opera combined the art of gnarly grinds and other various rad skating techniques with a fantastical atmosphere, compelling story, and an epic sound track; in a way thats won the hearts of the critics as they describe it as "A radtastical ride!"

Fantasy Man, from Noel Fielding's Luxury Comedy, is the most Radtastical fictional Character ever conceived.
by SilverHammer27 August 2, 2015
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Rad and fantastic combined making a force to be rekoned with. If you are radtastic you are the best.
That movie was so radtastic i bet it will get great reviews
by sctso April 28, 2003
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(adj) Something so great, or tremendous, and unbelievable that it supersedes all other synonyms of both good and extraordinary.
Although she was nothing more than an iconoclastic misanthrope, she had to admit that her adversary's discovery was radtastic.
by Bradley Darren Davidson November 14, 2006
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The most rad'st thing that can come up to mind
Dang T.A.K is like the most Radtastic skate crew out there man!
by Devin Starr May 15, 2009
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something so fricken cool you couldm't even use the normal word "rad" to describe it!!
that was SO radtastic!

you are very radtastic
by asdfcodyjkl; July 19, 2008
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