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1.
a twitter group known for their bitchy tweets and is abbreviated as bsb. The group started in the summer of 2012 after a member made a type for "baker street", and continues to today. commonly obsessed with one direction, bbc dramas, and supernatural, this group will not allow others to join. Although some aspects of the group may seem fun, this is not a group to get involved with. the group fights occasionally but supports each other. they are gutsy and rude.
"hey who are those people talking about fanfic?"
"oh just some backer street bitches"
by okay so i needed a pseudonym January 20, 2013
 
2.
a group of 13 girls ranging between 13-17 years of age. formed in august 2012 on twitter, they are known for constantly starting twitter fights, or "beef". though they come off as hostile, they're fiercely loyal to each other and others outside of the group. they are very exclusive, so just asking to join their group comes off as naive and a tad idiotic. all in all, they are either very respected or very looked down upon, but they still continue doing their own
"Bro, did you see that beef on twitter last night? So many people got blocked!"
"Dang, I missed it! I was too busy watching Bates Motel! Who was involved?"
"The Backer Street Bitches, it got hecka intense!"
"Typical, right? Haha!"