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September 10th is national beat your boy bsf day, this is a day where its ok to abuse your male friends.
Boy- why tf do you keep hitting me?
Girl- because it’s National abuse your boy bsf day!
by Tuna is disgusting September 7, 2022
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National bsf day

You have to become bsf with one person
Go up and ask to be there bsf happy national bsf day
by Bsf4ever September 23, 2019
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Rogans BSF

Referring to Rogans Best Friend, particularly a freshmen that doesn’t like to take the blame for being Rogans sidekick. A fiend that likes to get pushed into lockers. (Rohan-Junior) ( fiendy freshmen)
Example: “Fiend(no name mentioned) why do you blame a junior(no name mentioned) for being Rogans BSF(best friend)
by PandaBoxer000_[ December 12, 2022
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BSF

BSF, acronym. Short for Bud Softball Fan. That guy a woman says is her best friend for making her a softball star, when everyone knows she's ready for some hardball!
It's like Neo, from the matrix always said, "If you call me big papa, and I call you Madame I mean My Dame, I mean Ma Damn! there better not be any BSF laying claim John Wick Zaddy cred... Because I want you in the big leagues, your royal majesty"
by DiamondDouche December 4, 2023
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BSF

BSF: Butt Sex Friday's. A day of the week where you exclusive have butt sex/anal sex.
Kyle: what is BSF?
Josh: Butt Sex Friday's

Kyle: Oh, I love BSF!
by RagNasty November 1, 2020
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national post ur bsf day

july 5th ~ national post a good picture of ur bsf dayyy
1: “hey chicken butt,yk what td is??”
2: “uhh no sweet cheeks, what is it?”
1: “ NATIONAL POST UR BSF DAY”
by monkeyrive July 4, 2024
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BSF

That’s my bsf

She’s my only bsf
by Divine archer January 2, 2022
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