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."
"I'm attracted to them because of their BSB."
by Emelie Courbois May 10, 2018

Bsb is a Big Smelly Bush
by Nqthsz August 03, 2023

She got dat bsb 😝
by Big_tismo420 May 20, 2023

by Dish February 03, 2004

by Lucid Entity January 28, 2004

Backwards Snap Back (BSB) pertains to a snap back hat. this is traditionally worn forwards, however a BSB is turned backwards with the bill to the back. It is the headwear of choice for dudebros, aspiring iTunes rappers, and tools in general.
Peep that gymbro hitting bench press with a BSB. He had to sit hella far back for his bill to clear the bench. This place is turning into a tool shed.
by Functional Derelict February 22, 2015

person1:Wow , look at that gurl , she is working alright ! Oh yeah turn your around baby ,oooouuuuu CHOW !!!!she is a BSB
by warna_2003 February 22, 2005
