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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 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

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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Blanket bsf

A blanket bsf is a MF that you could cuddle with because their blankets smell like piss juice. A blanket bsf could also be someone who u talk so much shit about but the “blanket” is covering all of the sneaky secrets...
A blanket bsf could be someone who you want to finger you under a blanket 😩🤚🏽.
Bsf 1: ou bsf your blanket smells like piss . Lets cuddle
Bsf2: yeah.. now I am your blanket bsf,

Bsf: finger me under the blankets. 🖖
Bsf2: okay.. I’ll become ur blanket bsf.
by stankasf February 9, 2021
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Bsf

by Patel56 May 26, 2019
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BSF

best sex friend best friend you have sex with
Alt night was great I hung out with my bsf ;)
by Yhnhjk September 5, 2022
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BSF

That’s my bsf

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