best friend for awhile, or someone that you've befriended because you have to/for selfish purposes and as soon as you don't have to see them a lot they will no longer be a best friend.
kate: so how are you and the new roomie getting along?
madison: ugh she's so annoying, but she's my bffa because she always gets into awesome parties and takes me.
Description you see on gay dating app for sexual preference. Somebody says "Not into BFFA" to speed up the selection process and avoid unwanted contacts.
BEST FRIENDS FOR AS LONG AS POSSIBLE--- two people who go to eachother for everything and sit at starbucks together with nothing in particular to talk about and play phase 10 and eat applebees everyday. They are the two people you expect to see together all the time and when you see one, you automatically assume the other is around somewhere.
An abreviation of "Best friends forever and ever and ever" It is often used by preppy pre-teen girls. It is also used in a 'trendy' way by scene girls.