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'Straight Best Friend'. For Gay people who have a best friend who is straight as a ruler ;)
Girl: OMG Your are my GBF!

Gay Friend: And your my SBF!
by smokeajeffrey October 27, 2014
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Single Black Female; an expression typically found in personal ads.
Hello, SBF looking for a relaxing and pleasurable time...
by Repetitive Redundancy July 02, 2006
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To communicate splash back in a manner more acceptable to the general public, use the acronym, S.B.F or Splash Back Factor. Typically, rated on a scale from 1-10, the S.B.F. can be viewed as a way to rate the degree of your splash-backedness.
Henderson: (walking out of bathroom)

Juanita: So did all of that Kashi Go-Lean make for a serious shiz break?

Henderson: Hellz yah! I'd give it a S.B.F. of 6.9!!!!

by sarahXwray March 30, 2008
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Surprise Butt Fucked. When you don't see butt sex coming. Its not rape, its surprise butt sex
Dude: I saw that guy on tv get sbf
by Jenyen January 06, 2011
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acronym for "Shes Beast Fool"
It can pertain to an ugly girl, ugly car, or all things ugly.
"This fat chick, Jen, SBF!"
by NO DIC3 December 07, 2009
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Secret Best Friend. When u already have a best friend but there's another that you have some connection with and they're incredible and the person you're best friends with isn't your bff any more.
Cydney : you're my best friend. My sbf
Rayssa: Same, makaila is a bitch and plus I have a connection with you 💛
by RATCHETFAMRCDCCSDAM November 25, 2016
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