(adj.) a word that describes something that is so far beyond amazing that this is the only word to describe it.
Teacher: Does anyone know what the synonym for-
Jack: RADTASTICAL!
Teacher: No, Jack. And you really should really start raising your hand-
Jack: -BUT, I DO!
Teacher: Yes, Jack. AS you're blurting out what you have to say. So does anyone know the synonym for- oh- I guess you're right, Jack.
Jack: RADTASTICAL *:D*
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
(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.
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!
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!."
something so fricken cool you couldm't even use the normal word "rad" to describe it!!
that was SO radtastic!
you are very radtastic