look up any word, like blumpkin:
 
1.
To be more radical then normally thought possible by non-rad people.
My brother is the raddest person EVER.
by TheLastMinute August 12, 2004
 
2.
To be thought of as pretty much totally amazing; awesome.
My friend said I was the raddest guy ever!
by AquaFresh13 September 19, 2009