AA 

an abbreviation in the popular MMORPG Everquest, meaning Advanced Abilities.

Ding, I just got another AA brotha!!

AA by Jimmy Stewart July 26, 2006

AA 

Alcoholics Anonymous; an organization for pussies, ran by pussies.

Only blubbering pussies go to AA.

AA by Max Biaggi May 13, 2005

AA 

an abbreviation for Anti Aircraft gun or Anti Air

Player 1: Hey lets go shoot some planes in my brand new AA gun!
Player 2: Sweet ill go grab the AA shells.

AA by Sergio April 3, 2005

AA 

Acronym for "Adult approaching". Usually used by teens when talking about something they don't want an adult that is closing in to hear about.

Finn: So then the teacher caught me- Um, AA.

Adult: Hey!

Finn: Hey...

AA by CoconutMuffin June 23, 2011

AA 

assertively affectionate

I need to be more AA if i stand a chance with this girl

AA by joebert smith May 24, 2009

AA 

ITS a FRICKEN BATTERY DUH

my AA's are out
my AA's are out

AA by BIGDOG July 26, 2006

AA 

1. All Americans aka the 82nd Airborne Division, the most badass unit ever.
2. Airborne Alcoholics, nickname for the paratroopers in the 82nd due to being drunk all the time.

Joe: PVT Snuffy had a hangover on the Blackhawk jump today, he's a real badass.

Joe #2: That ain't shit. Spc. Hardcore was doing shots on the bird, he's the reason we're called the Airborne Alcoholics!

Joe: I thought the AA on our sleeve stood for All Americans!

Joe #2: Shut up you stupid cherry.

AA by poopmasterflex December 29, 2008