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

BSB

When someone has transcended the relationship status of a best friend, and are now a backseat buddy.

Holy hell, I think they're BSBs for LIFE!
No Way!

by HAIM8 January 1, 2024

BSB

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

BSB

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

bsb

big stinky baby

dude. by the way your acting rn, ur being a bsb.

by bigstinkybaby September 26, 2021

BSB

BSB means Big Steppa business. Which means you’re all about your business and no one is on your level

Julian got his bag up,He must be about his BSB

by BSRo February 7, 2022

BSB Special

To cave ones date in. Bumsex.

Michael asked lez if she wanted to receive a bsb special.

by Flying bum September 25, 2020