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
by 0ceanFrank January 30, 2019
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Ashling: I can make french toast

Lisa: that's a load of BSB!
by Ilovefrenchtoast123 January 28, 2017
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Bsb: A back stabbing bitch She hurt you and is a total asshole.
Jeez that Megan girl is such a Back stabbing bitch
Oh! You mean a bsb?
by thiccthot69 November 23, 2019
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Big.Sexy.Brain. All of the intangible reasons you find a person sexy. Their laugh, their smarts or their sense of humor. BSB can even be attributed to being attracted to unconventionally attractive people/elements of a person.Their freckles, or red hair, or their chubbiness. BSB is an unconventional thing that attracts you to someone else.
'That guy over there has BSB.' "The one with the freckles? Oh yes"
"I'm attracted to them because of their BSB."
by Emelie Courbois March 13, 2018
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Big Sperm Buildup - used when you havent had sex for a while
Havent had sex this week so have a massive bsb
by Slimeburger January 19, 2007
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Person 1 : Ew look she got a bsb

Person 2 : Whats a bsb..
by Nqthsz August 3, 2023
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big smelly bush,’ derogatory, used against Maya and Anna from Pen15.
She got dat bsb 😝
by Big_tismo420 May 20, 2023
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