Defcon 

DEFCON 5 Normal peacetime readiness
DEFCON 4 Normal, increased intelligence and strengthened security measures
DEFCON 3 Increase in force readiness above normal readiness
DEFCON 2 Further Increase in force readiness, but less than maximum readiness
DEFCON 1 Maximum force readiness.

The nuclear bomb threat put us in defcon 1.

Defcon by deadmanwalking May 3, 2005

Defcon 

A hacker convention located in Las Vegas every summer where people go to:
1: Learn about the latest computer vulnerabilities, exploits, mods, and hacks.
2: Participate in (generally) computer related contests such as Capture the Flag, Wardriving, Wi-Fi Shootout, Scavenger Hunt, and Spot the Fed.
2: Get trashed and hang out with fellow geeks.

"Defcon, where you walk in a n00b, and walk out a 1337 HaXX0R!!1!eleven."
"Dude, we actually got some depleted uranium for the scavenger hunt for 80 points!"
"During PoolCon, I got soooo shitfaced and made out with one of the haxxxor girls.... or at least I think it was one of them."

Defcon by Factor January 24, 2005

Defcon 

Stands for "defecation condition" - a play off of the government acronym for "defense condition". Refers to the varying, and usually scaling, levels of severity relating to an impending bowel movement. The direction of the sliding scale varies from user to user, but typical usage labels Defcon 1 as the least urgent, and Defcon 5 as an imminent expulsion (the opposite of the defense department's usage).

Dude, I was at Defcon 5 and nearly shit my pants. Luckily we drove by a Carl's Jr. and I was able to drop a load.

Defcon by The Colonel July 18, 2003

Defcon 

Defcon is a famous hacker. He is member of the hacking group called "Anonymous".

In April 2011 he took apart in hacking playstation network, and in November 2010 he attacked over 3000 websites at once.

His identity is currently unknown.

Defcon.

hackforums.net/member.php?action=profile&uid=574192

foxnews.com/scitech/2011/04/25/hackers-bring-playstation-network-stolen-credit-cards/

Defcon by Cadjenovic February 4, 2012

Defcon 

An upcoming game from Introversion Software, based on the movie War Games.

Defcon will probably appeal to a wide audience.

Defcon by BSUmerc July 16, 2008

Defcon 

A result from smokin the giggles and being all sorts of giggled up and the stages vary from 1- whatever level of giggled you are!

CH, I am defcon 40 right now...

Defcon by Chrissy561 January 26, 2011

DEFCON 

Awesome as metal band from Mildura in Australia. With influences from Megadeth, Delian League, Dream Theater, Metallica, Pantera, Iron Maiden, Metal Church, Iced Earth, Mudvayne and Slipknot. with their own unique metal sound these guys rock hard, hence the fact that "DEFCON are better than your favourite band!" - Keep A'rockin you guys.

me: hey dude, you see DEFCON last week?
guy: HELL YEAH! they kicked ass, best band of the day!
me: totally. lets go see them next time they play?
guy: sure! they rock!

DEFCON by haha, an awesome fan. May 1, 2006