The founding fathers C,T,L started to use this word the early 2008 and is well known is Redwood City.
A word you say usually in a chewbacca tone that expresses excitment. The more excited a person is, the long he says the word by rolling the "b".
Guy 1: "We out to Great America this Saturday"?
Guy 2: "Fuck it. We out. Abbba"!!!
"Abbbbbba. I just saw a naked girl"!