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Best sister/friends
When two best friends are so close that they consider themselves as sisters !
- Pauline and Catherine are really close!
- Yeah! They're BSF s :)
by foreveryounnng May 12, 2012
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May 5 Word of the Day
A catch all word to describe anything that is basic, uncool or untrendy. According to The New York Times, "cheugy (pronounced chew-gee) can be used, broadly, to describe someone who is out of date or trying too hard."

Things that are cheugy:

The New York Times
PT Cruisers


Addison Rae
White people

The person writing this definition
via giphy
by Callmemaybe69 May 04, 2021
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A bsf means best friend usually, bsf can mean a best friend who is like a sibling to you or just a best friend
via giphy
by Your_Dictionary April 14, 2019
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When someone uses β€œBsf” in a text, it usually means bestfriend.
Girl 1: Heyyy Bsf

Girl 2: Hey, hows it goin bsf?
by RugRat-47 June 13, 2018
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"Bull Shit Foursome"
Four friends who often go out together on random crazy adventures and day trips.
Let's go out BSFing this weekend!
by Cindy5 January 24, 2009
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The cliched phrase every guy tells to a girl when he wants her: Beautiful, Smart, and Funny.
Hey bro, did she say yes?
Nah, I did the BSF way too early
by Kukoo October 09, 2010
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