RFF
R.F.F stands for Reverse Feminine Fart
In other words, a queif. Many girls use the word rff insetad of quief because quief sounds gross and it sounds like something that can only happen during sex. Girls that can rff usually put their legs in the air to get the air up their parts and then they can rff on command. Some girls have to get the air and then stand up to rff.
Chandler laid down and put her legs up in the air. She felt the air going in and let out a loud rff. All her friends giggled.

Marina- "Jill! Guess what? I learned how to rff!!"
Jill- " Dude, Marina, I learned how to do that a week ago."
by girlswholikeboyswholikeboys March 17, 2010

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Top Definition
RFF
Real Fucking Funny
I told Sam a stupid joke and she replied RFF like an idiot.
by Bryannnnbizzle July 09, 2009

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RFF
Abbreviation for Really Friendly Friend; a friend with benefits or a potential future boyfriend
"Nick and Sarah are such RFF!"
"I know, Sarah told me she hooked up with him last weekend!"
by newbornfml January 07, 2009

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The Urban Dictionary T-Shirt

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The Urban Dictionary T-Shirt

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