Big Fat Friend. The larger less good-looking friend of the hot girl at the bar. She can sometimes cock block a guy who is trying to sleep with the hot girl. Best to combat this by deploying your wing man.
Sheila was looking so hot, I was really trying to get up in that; but her BFF kept getting in the way.
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Abbreviation for: Best Fucking Friend. The person to whom you are closest.
Dude, you're my bff! We get along so well.
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Abreviation used to call an overweight person, big fat fucker
brian told me to block that bff
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Girl:Boy, you are my bff (best friends forever)
Boy:Girl, you are my bff too (he have mean bitch for fuck)
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Acronym for "Best Facebook Friend".
Meaning a person who you are in contact with regularly on Facebook, however you rarely speak to in real life.
1: Hey man you know that girl Cindy? She must want to get with me. We've been talking on Facebook all the time!
2: Forget it dude; she's just a bff.
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