BSB 

BSB-Backstreet Boys, popular five male vocal worldwide.

BSB fanfiction, "I'm a BSB fan!", "BSB is the best group."

BSB by Dani January 8, 2005

BSB 

Bitter Single Bitch: A woman who hates on other woman with companions due to the fact that they are bitter and insecure. These creatures will do everything in their power to break up every happy couple that they can by lying, spreading rumors, deceiving, manipulating, etc.

Tom: Cindy's friends are some BSB's man I can't believe they tried to break you guys up.

John: I know man, but that's the life and motivation of a BSB so what do you expect.

Tom: You're right. BSB's...smh

BSB by Rey90 December 7, 2009

BSB 

The online abbreviation for "Brooklyn Steam Bath". Useful for when you're in a hurry.

superstud123: dude, brb, i need a bsb bad

superstud456: whoa, you must stink in brooklyn

BSB by Merek1213 July 22, 2009

BSB 

It means Brush Shit Bath. It can be used to describe a person morning routine.

Timmy:- Hello
Frank:- Hello, did you BSB?
Timmy:- Not yet
Frank:- It's 12 already, go and do it stupid!

BSB by WDTDS June 20, 2021

BSB 

A backshot baby(being conceived while your parents were in doggy style)

Ew, he’s a bsb, I better stay away from him

BSB by Hshauxbnsuz December 13, 2021

BSB 

Big Sum Bitch

When someone is so big and can't get out of their own way but you don't have time to talk to them so you just call them BSB

Craig is such a BSB. He wouldn't move last night.

BSB by Firefighter5858 September 8, 2016

BSB 

A shorter way of saying British Soft Boy
These types of guys usually have brown hair, tall, usually white, obviously from the uk and just in general the most sweetest person ever. Mostly actors who are aged 20-25 are the typical British soft boy.

(I would say this in texts instead of irl..)

A: Did you see Alex Lawther in The End Of The F****king World?! He was amazing!!

B: Omg yess!! He’s a BSB

A: A what??

B: A British Soft Boy <3

BSB by 0ceanFrank January 30, 2019