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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 14 Word of the Day
Intelligence agency term for "psychological operation". A government or corporate-sponsored operation, usually taking the form of a "terrorist attack" or "crazed gunman on a spree", with the intent of panicking the public into demanding more police and laws inhibiting freedom. Psyops are usually carried out by drugging a civilian or group of civilians with aggression-promoting drugs, psyching them up, arming them, and sending them out to commit mayhem. Government-sponsored terrorism. See also blackshirts, conspiracy
Person A: Man, that nutcase Martin Bryant guy shot 35 people in Tasmania!

Person B: No, he wasn't a nutcase, that was just a psyop so the government could have an excuse to ban guns.
by Mystikan April 11, 2006
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2
A bsf means best friend usually, bsf can mean a best friend who is like a sibling to you or just a best friend
by Your_Dictionary April 14, 2019
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3
When someone uses “Bsf” 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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5
"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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6
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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