Boyfriend-Fucking-Bitch. A women who has sex with other women's boyfriends with no regard for the women being cheated on.
He told Geri lynn he'd just sex with me 2 hours earlier, and she had sex with him anyway, she's a real BFB!
by KarmaKitten February 21, 2009
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An acronym meaning 'Before FaceBook'
That shiza is so played out... circa BFB
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An acronym for "Big Fat Blunt", a paper tool utilized to smoke marijuana from. Typically the BFB phrase is employed when a user wishes to get incredibly fucking high.

BFB can further be modified by inserting other adjectives into the acronym, such as a BMFB: Big Mother-Fucking Blunt
Stoner 1: Hey brah, whatchu doin' later on?

Stoner 2: Kickin' it with a BFB - come over and hit that shit!
by Johnsely August 24, 2009
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Acronym for a Big Fucking Building, especially in reference to a large building in which a good deal of sexual encounters take place; in other words, a slang name for a large hotel.
Dude, have you seen the new hotel downtown? Now that is a BFB,
by randompersonabcxyz July 19, 2010
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Breathing for Batman. In anticipation of the summer blockbuster The Dark Knight, many fanboys have come to use this as a way of expressing their 24/7 love for the film. This can also be used rhetorically or sarcastically against aforementioned fanboys.
From now til July 17, I'm just BFB all the way.

No way Ryan is gonna want to go out Friday. He's gone gay for the week, big nipple suit lovin' BFB.
by Aaron Joe July 18, 2008
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Big Fat Blog: a fat acceptance site.
Big Fat Blog - BFB for short - is one of the leaders of the fatosphere, bloggers who post about sizism, fat acceptance and the rights of fat people.
by tante March 2, 2009
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Acronym for 'better from behind'. Used to describe a visually challenged woman. Instead of adopting a missionary position or the girl on top, take the female from behind so one does not have to look at her face.
"Hey Nik, what was Angie like last night?"

"Oooh. A bit of a bfb, mate. We started off with her on top but Little Nikky was not not impressed - he retreated into his shell. Flipped her over and no probs. A lot better from behind."
by The Strut October 20, 2004
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