BFF 

"Best female friend"

Differs from BF, which means "boyfriend."

I'm throwing a bachelorette party for my bff next week.

BFF by Astergirl September 13, 2005

BFF 

Best Friends Forever. Similar to BFFL.

Becase they are BFFs.

BFF by KC24 November 29, 2011

BFF 

Big Fat Friend

You are my BFF (big fat friend).

BFF by xllFuckOffllx October 4, 2015

BFF 

Butt Fucking Friends. BFF's are friends that routinely engage in anal sex with one another.

Me: "Have you seen Ted and Steve?"

other person: "They wanted some alone time they are BFF's"

BFF by iantmcg December 23, 2011

BFF 

Contrary to popular belief the acronym BFF does not mean best friends forever. The actual meaning behind this is "Built For Fuckin" and refers to any female that has features that make her good for one thing and one thing only...FUCKING!! Features such as a big round ass, big ass tits (perky or floppy), long luscious legs, big full lips, and sexy fuck me eyes are all traits that make one "BFF"

guy 1: "Damn dog, look at that bitch over there she's fine as wine"

guy 2: "Yeah, she's definitely BFF!!"

guy 1: "what's that?"

guy 2: "means she's built for one thing and one thing only...FUCKING"

BFF by T Weezy77 October 1, 2012

BFF 

When applied to women, an annoying acronym meaning Best Friends Forever, but when applied to guys, has a slightly more condescending meaning, such as Butt-Fucking Fags, or Biggest Fucking Faeries, or --you get the idea

OMG, those fags are sooo BFF!

BFF by Mr. Carrington June 23, 2006

BFF 

ACRONYM FOR "BEST FUCK FRIEND", ITS LIKE HAVING A BUNCH OF FUCK BUDDIES,BUT ONE IS BETTER THAN THE REST.

HEY SYLVIA, OUT OF ALL MY FUCK BUDDIES YOUR MY BFF!!!!

BFF by Jellybear May 9, 2009