BFF has two definitions
the most common of which is : Best Friends Forever

the other is the complete opposite and is: Big Fat Fuck
Yo dude, that guy is my BFF, we have been friends our whole lives and we will until we die
Man that girl is such a BFF, she is so fat and annoying
by shlubster January 24, 2012
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Your "Best Friend Forever". Someone you know you can trust. A sibling from another parent. The one friend you hang out with the most. Someone who will laugh when you laugh, cry when you cry, and smile when you smile. They will stand up for you, and they will listen when you blab on and on about all of life's problems.
I can tell my "BFF" anything in the world, and they will listen.
by L.4.Life November 20, 2016
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BFF stands for Best Friend Forever, to me a BFF always has your back and is with you through everything. Having a best friend should be like having a brother or sister. Sure you'll have fights ,but you'll always make up. A best friend is someone you can't live without someone that fills a void in your life, someone who cares about you and who you care about. You shall have the strongest bonds that no one can sever. You may go in some of the best journeys in life together and have the best experiences while in each other's company. A BFF is a true friend you will have forever.
I known my BFF for 20 years and have had a lot of fantastic fun on vacations with her.
by TheQuietSpectator June 01, 2015
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Means Big Fat Friend, Big F*****g Friend, Big Fat Female, Brown Flowers Friends, ex...
Hey! Look it that BFF!
Yeah, he's a f***er!
by Jaemins Pink Hair October 16, 2019
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Stands for Best Friends Forever. An abbreviation mostly written on binders or notes by girls in grade school, however, over the last few years, people who use to use the term in grade school have actually started saying it, typically in a joking manner, to mean a close relationship with someone.
OMG Wendy is so cool, we are totally BFFs now.

We have so much in common, its like you are my BFF.
by evapor8ed March 22, 2006
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Best Friends Forever.
(a) {in magazines} used as 'best friends' because they can't write bf cuz thats boy friend, and theyre too lazy to make grammatical sense of it..
(b) Something random to say at the end of an email - but really, who uses e-mail anymore when you could 1) use the P-H-O-N-E, or 2) Hello? Instant Messenger?!?
(c) Yearbook
(a) My bff's bf Bradley F. is going to the mall today. = My best friends forever's boy friend Bradley F. is going to the mall today.
(b) Talk to you later ;) BFF
(c) You rock don't ever change! BFF!
by Bambam_For_Flinstone December 31, 2004
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