n: a unit of measurement used to describe a dose of radiation. A single rad is equivalent to 100 ergs per gram or 0.01 joules per kilogram of irradiated substance.
The Federally-defined maximum occupational radiation dose is 5 rads per year.
by Ten Second Tom September 29, 2005
A more excting way to say 'cool' or 'awesome' mostly used back in the 80's. On the show Full house.
Freddy's house was uber rad yesterday!
by SuPeRsTePh September 10, 2005
ride and destroy.
A rad skate session. we skated, we destroyed
by don October 07, 2008
When awesome and cool just aren't enough to describe something.
Aj: "We're awesome!"
May: "No we're not, we're better! We're fucking Rad maan!"
by MerMaydens February 07, 2014
The point of complete inebriation from alcohol, where oneself does not know right from wrong. Generally consists of expelling bodily fluid or excrement on in adamant objects or in extreme cases people. Can also be characterized by the individual breaking shit or even having sex with walls or animals.
I am fucking sick and tired of work this week. This leaves me no other option than go downtown and get fucking Rad and watch Lou Dog.
by hotttbuttt608 November 16, 2010
Acronym for Random Act of Douchebaggery. An act in which the one who participates can be tagged as a douchebag.
That guy's move cutting me off was RAD.
by RocketSled October 16, 2009
A term often used in counterstrike to describe "Reload and Die". This term was coined in October 2005 after an extremely popular counterstrike clan named |-=R]AD=-> made a public announcement for suggestions on a good meaning for the clan name. Originally named atfer the founder, Richard A deChevigny.
Rad = Reload and Die

You just RAD!

by Ed Yerex November 26, 2006
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say (adults try to use it to make them look cool) but that term went out in the 90s and it is a cool example of how outdated adults are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.
by Allahan November 13, 2010

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