PBF

Party Best Friend
Term used to describe a one night "best friend" at a party. Usually seen drinking together, laughing, saying you will be best friends forever, then not ever talking after. You can always depend on them for the night.

Jenna: So I saw you hanging out with Emma last night. What's up with that?
Holly: Oh. She was just my PBF. We took shots together and held each others hair while we barfed. We stuck together all night.

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