1. Your ex best friend who
fucked up your high school life and is now
fucking your ex.
2. Peter Pettigrew, because why the fuck not, he was a real bitch.
3. Your best friend who'll never
ditch you for a date with her man.
1. "Oh, yeah, she's fucking with my
toy now, I thought it was
broken but idk tho."
2. "Peter Pettigrew is a bitch from Harry Potter who betrayed the best friend who never suspected him."
3. "You mah bitch."
Basically bitch is used for
friends, real and fake, both.