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1.
BRF
Bitchy Resting Face, a disorder that makes women look bitchy when they're not.
Guy 1: Look there's the girl Matt hooked up with last night!
Guy 2: Wow, I heard she's really hard to get.She barely ever smiles.
Guy 1: Nah, man, she's easy. She just has BRF
by Megan3333333333 May 28, 2013
 
2.
BRF
Bitchy Resting Face.

A relaxed face that looks mean or can be misunderstood as being in a bad mood when it's not.
Search for the web for this term to see some funny examples.
BRF

www.funnyordie.com/topic/bitchy-resting-face
by c094728 July 03, 2013
 
3.
BRF
BRF, or Best Roomies Forever, is a term used to describe a room-mating experience that brought you closer to someone you didn't know at first.
Man, that weekend in Tampa rooming with Megan made us total BRFs. We're going to room together again over the summer.
by MissTampa May 01, 2010