cari istilah yang lo mau, kaya' blumpkin:
 
1.
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!."
dari Samantha Sadler Minggu, 05 Maret 2006
 
2.
(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*
dari bleyw&trippy Jum'at, 08 Januari 2010
 
3.
Amazing, radical, the greatest
That movie is radtastical.
dari MacAttack Rabu, 04 Mei 2005