A woman that is one level above a jump off but always a step below the wife, wifey, girlfriend. A side bitch must know her part. She does not get holiday's, birthday's (other than her own). While he may meet your family. You will never meet his.

A female who is having a romantic or sexual relationship with another female's significant other or spouse. She may truly be in love with the "taken" individual. The "taken" person may or may not necessarily reciprocate the feelings, but the fact remains nonetheless that s/he has a "main girl" and is cheating on her with this female.

when a girl is not exactly his girl. Someone who he treats as he should his girl but never commits to her. She usually feels like shit.

Side bitch is a female who can't get a man of her own so settles on being a fuck. Ladies if u choose to be a Side bitch careful not to catch feelings and when u in the presence of the Main bitch u better step ur ass to the side where u belong!;)

When one person in a commited relationship suspects the other is being unfaithful to him/her, by cheating with someone else secretly on the side.

She fuck
She suck
But most importantly, she probably doesn’t know about you first bitch

Usually a girl best friend that's pretty close that you wanna fuck when you have a girlfriend. Most commonly an ex-best friend/friend of your girlfriend.