Standing for "Best Friend For Life," BFFL is used between people that like each other, but know that they won't be friends in the afterlife. Not as binding as BFF ("Best Friends Forever").
Dave: "Hey BFFL, I was thinking. We're close friends. Why don't we start calling each other BFFs?"

Jeff: "I'm sorry Dave, I just can't make that kind of commitment. However, if we do happen to be best friends in the afterlife, I'll definitely upgrade our relationship."

Dave: "Thanks man. I really appreciate it."
by sammysf October 26, 2010
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"After having a friendship for 40 years Mary and Sharon consider each other BFFL's"
by Alexander Sedler October 30, 2003
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BFFL is a term used to describe an unbreakable union between friends. Typically used between two drunken girls at a Denny's after a night of drinking and shenanigans.

A BFFL is not spoken letter by letter in abbreviated form example- B.F.F.L. pronouncing the letters individually makes you a dumb ass and gives it less meaning.

A true BFFL is pronounced as a word in whole, when spoken properly it should sound like (BIFFEL) but always be spelled BFFL

BFFL can also be used as a noun example- "We are BFFLING"
Heater is Belinda's BFFL

Belinda is Heather's BFFL

When Heather and Belinda go out drinking and get faded they are BFFLING to the max.

BFFL Heather Belinda BFFLING
by Atlas mommy July 30, 2013
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best friend for life- your shoulder to cry on, your person to shout all your shit to, the person who will always be there. a person who you will ALWAYS love, even if they're not always there. u can depend on this person because you know they are always ready with an axe to kill whoever hurt you. and also the one you can be a dork around, and not care. also NEVER a bitch.
Claire and Maddie are such dorks.

No, they're just BFFLs.
by layspotatochipsROCK May 13, 2010
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Best Friend, Future Lover. A term of endearment towards an individual who currently exists as your best friend. However, both of you know at some point in the not-so-distant future you will be lovers
“Hey, you seen Gracie lately?”

“Everyday man, she’s my bffl
by jessiekenn February 10, 2019
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best friends for life

A BFFL is someone apart from a friend. You can't, and won't, hide things from this person. They're as close to you as family.
Even the eight years of separation couldn't come between them, they were without a doubt BFFL's. They never hid anything from eachother.
by xLIVExLAUGH xLOVE March 20, 2008
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