Rad 

probably used by the Z-boys (and me) to expess extreme delight at some completly, outstanding, overpoweringly decent. Also probably started by stoned aussie surfers from the stoneage, along with narly, bogus, dude and surfing

Livi skatepark is RAD as fuck man!

Rad by SanJ Street August 3, 2003

rad 

definately the new word fer "cool"... so much cooler than cool

you: you're rad
me: thanks... i am quite rad

rad by josprettyrad August 22, 2006

Rad 

A old word that was used to describe something excellent, great and like everyone else said on here, 'cool'.

That was like, TOTALLY rad dude!

Rad by ??? August 5, 2003

Rad 

Short for "radical," it's a word that needs to come back. Often used in conjunction with dude.

Dude, I can't believe that you memorized the periodic table. That's a totally rad waste of time.

Rad by Quam Celerrime October 2, 2008

Rad 

an outdated slang term meaning "good". possibly still current on the west coast, land of scariness.

if you've used the term rad since since 1990 in any way but to make fun of it, you are a sad individual

Rad by minghi May 21, 2003

rad 

what adults THINK kids say (adults try to use it to make them look cool) but that term went out in the 90s and it is a cool example of how outdated adults are

Adult Fukock: You is rad.
Me: Fuck off wrinkle-dicked tard.

rad by Allahan November 16, 2010

Rad 

A word that gained popular usage in the 1980s. It is an abbreviation or "radical," and is a synonym or cool and/or stellar. Synonymous with surf bums and teens who think they are still in the 1980s.

Surf bum: Duuude, I just got tubed in the most righteous wave today!
Valley girl with big blonde hair and spandex: Like, ohmygod, that is SO rad!

Rad by Sir Joshizzle July 14, 2006