a group of girls that are beautiful bitches.
"Wow Morgan and Delia are such b girls"
As described in the song "B Girls" by the 1980's - 1990's rap group "Young & Restless".
A B Girl is gold digger who specifically target guys who possess items starting with the letter B. Specifically, these include "Broncos, Benzes, BMWs, bass, bangles, and "a pair of bars (chrome wire-spoke wheels) on a Cadillac Brougham".
These women were the gold diggers of the 1980's and mid-1990's
Man 1: Hey, you see that girl over there?
Man 2: Leave her alone! She ain't nothin but a B Girl!
Man 1: I hate all these B Girls around here!
Girl 1: Have you seen Lindsay lately?
Girl 2: NO! What happened to her?
Girl 1: She turned into a B Girl.
Girl 2: What a slut!