Bsb

Bestie since birth. Someone u have known since birth or for as long as u can remember. U have always been there for each other and always will be. Can be boy and boy, boy and girl, or girl and girl

Girl #1: ugh I miss jack, he’s my bsb, can’t believe he had to move away

Girl#2: girl I may have not known u since birth but honey I will be here for u

by Happyhour101 August 20, 2018

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Means (B)itch (S)ince (B)irth

Makayla Yoo so fine

BSB fashoo

by BitchSinceBirth March 30, 2020

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Backstreet Boys

My mom is going to BSB's reunion tour.

by SplishSplash April 7, 2020

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Bsb is a coffee type that stands for bullshit bitch.

I love Bsb coffee and strongly recommend it to you!

by Livelifelove April 4, 2020

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Butt Sex Brennen. I sweet dude that lies on occasion to his friends to sneak off and do butt stuff with anyone and everyone. An anal fetishist for the ages

Oh damn, it’s buttsex Brennen over there! Hey you said you were staying home tonight and now I see you’re just ramming holes!!! Wow, BSB... you’re truly Baron vonButtsex

by DonHippo July 22, 2020

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Acronym for "Backshot Bastard."
A human accidentally conceived during a reckless session of casual fornication, typically from backshots, where neither party had any real intention (or clear consent) to create life. The result: an unplanned, often unwanted child of pure lust and poor decisions.

Origin:
Term popularized by LowTierGod, a philosopher known for his unfiltered takes and elite-level roasts.

Bruh, that dude acts like a total BSB. No wonder his dad dipped before he was born.

by Kingdraya April 9, 2025

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