Side B 

Recycling the usage of your dirty undergarment by flipping it inside-out on it's "side B" which is supposedly cleaner than it's "side A". People who're lazy to do their laundry do this all the time.

"Dude isn't that the same Calvin Klein undies you were wearing yesterday when we went to the beach?"

"Don't worry man, it's on it's Side B"

"That's just gross dude..."

Side B by JBarry May 11, 2008

Side B 

Someone who's a loser and/or an asshole.

Dude, you're such a side B.

Side B by mulletboy August 13, 2009

Side B

Way of saying Side B theology; essentially used by those who experience same-sex attraction (therefore are gay, lesbian or bi) who do not affirm the lifestyle choices but rather opt to follow traditional Christian values such as marriage only being between a man and a woman, and sex only being for such marriages.

Yeah, I'm gay but I'm Side B so not gonna marry a guy.

Side B by catpeesweeties December 15, 2025

Bloc Side Soldiers (B.S.S.)

A Detroit graffiti crew from the mid-2010s that evolved into the Hyena Crips (83GC), a core clique of the 5 Point Nation Crip alliance. Originating on the city’s far Northwest Side near West Seven Mile and Five Points, B.S.S. was known for bold block-letter tags before shifting from graffiti to a loose street-crew identity as the Hyena Crips name took hold in the late 2010s.

“Before they were the Hyena Crips (83GC), they were Bloc Side Soldiers (B.S.S.), holding down Detroit’s Five Points neighborhood.” — Detroiter

Bloc Side Soldiers (B.S.S.) by Westside Detroiter November 13, 2025

B-sider

A person who listens to the less popular songs by hit artists.

Person 1: What are listening to?
Person 2: The Greatest Man That Ever Lived by Weezer.
Person 1: Didn't they make Pork and Beans?
Person 2: Yeah, this song is waaaay better.
Person 1: Wow, you're such a B-sider

B-sider by Jak Majik October 17, 2009

B-sides Syndrome 

Almost like hipsters,a person with B-sides syndrome likes to give major importance to the songs that do not appeal to the general public

Alex:I really like kaiser Chiefs.

Costa:I like them but I prefer the wierd dark songs they have,the ones that no one likes.

Basilio:Fuck you,you have B-sides Syndrome!

B-sides Syndrome by idon'tknow22 November 10, 2013

BSIDE 

Bside is a gang in Bellingham/drill group who are not very active anymore.

Mans from Bside still and what

BSIDE by Popamansketsa March 15, 2021