It's a short hand way and abreviation to say "Also Known As"
My name is Sammy A.K.A. (Also Known As) Big Sam.
by Anonymous October 30, 2002
The police are looking for John Doe AKA Samuel Pitz.
The suspect...
by Anonymous September 24, 2003
How to introduce a euphemism. Saying something while meaning something else.
Used in a sarcastic manner
We're going to watch a movie aka we're going to doink

You're cool aka you're a huge faggot
by John AKA Penis March 27, 2009
Puerto Rican and Dominican slang for an AK47.
"La calle me llama,
oh boy I love da drama,
have you seen a boricua loco chasing you con un aka" - Daddy Yankee (on the What You Gon Do Latino remix)
by D-Block_NJ June 20, 2006