radack 

Verb. After accepting an invitation or agreeing to go out you cancel at the very last minute using a lame excuse like "I have to work late", "Not feeling good all of a sudden", or "I got a sudden case of diarrhea ambush".

I sent in my invitation to Eric and Amanda's wedding but don't feel like driving 8 hours. I'm going to radack it and say I have to work over the weekend.

radack by GarytheMonkey November 1, 2006

Radaculous 

When things are getting so rad that the levels of rad are surpassing the levels of gnar. Resulting in Radaculous (typically a term used amongst skaters)

Dude i can't believe you just ollied that gap, that was radaculous

Radaculous by jamestown09 August 18, 2016

Radwack 

That sucks but it’s also kinda dope

“I went to an EDM concert last night and now I’m tired.”

“Bruh thats so radwack”

“I just ate a peanut”
“Bruh that’s so radwack”

Radwack by Miranda and Meredith March 12, 2019

Radick 

An individual with a giant heart and an abundance of friends. Full of rhythm and rhyme, a Radick is a great dancer with bad-ass moves. One of the coolest guys you'll ever meet, a Radick is one-of-a-kind, loyal, sensual, and caring. He is the host with the most; Radick is where the party's at. He is a collector of accessories and toys. A Radick does not deny himself any of life's pleasures.

Girl: What's your New Year's Resolution?

Boy: To be more Radick.

Radick by radrunes August 17, 2011

radaclysmic 

to be so radical as to leave one's mind in a state of devastation.

You fully blew my mind with that radaclysmic tre flip down the 10.

radaclysmic by radaclysmic July 29, 2010

radacious  

a statement used to refer to something being rad or extremely awesome.

Juno is a pretty radacious movie. It's totally boss.

radacious by duchessxxlizz April 27, 2008

Radacious 

Totally awesome/radical, a youtuber, a combination of everything awesome, completely mind-boggling

Man! That was Radacious!
Hey what's up guys? This is RADAC10US from RADAC10USGaming!
Look at that radacious guy!
That video game is totally radacious!

Radacious by RADAC10US June 24, 2013