BF is the abbreviation for Bitch Face. Used as code for when Ron and John see a bitch face person.
Ron: "John, we need to talk. Man that woman has BF. You can do better than her."

John: " No man, not that woman. She is too old and angry. I was pumpin' on that 20 year old there."
by T_rump_supporter November 27, 2016
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When a person (normally a female) has an unprecedented sour look on their face which equates to them having a bitch face.
Person 1: See that chick on level 6?

Person 2: She has mega BF going on

Person 1: Yeah man, proper bitch face.
by Gringoesai December 3, 2014
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1. Best friend
2. Boyfriend

Mostly used on Roblox to get past the censorship of boyfriend.
Definition 1: ur my bff!
Definition 2: OMG WILL U BE MY BF?
by SkeletonGuy November 15, 2018
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prnounced 'bee-eff'
by Sidmystic July 17, 2003
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The check-out girl at the corner grocery is a big fugly BF.
by SeaBat June 10, 2006
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