1.) A complete ho-bag bitch
2.) A woman who is highly undesirable.
Dude, my girlfriend is such a bum bitch, she hooked up with a buncha guys last night.
That bum bitch was naggin on me all day.
A bitch who has nothing going on in her life, usually by choice and sometimes by circumstance. She is not in school, does not have a job and usually has 1 or more children out of wedlock with an Ashy Larry type bum nigga. She is loud, has tattos, may wear stank looking weave, hygiene is questionable and she is not very desirable, unless you are an Ashy Larry bum nigga, desperate. Bum bitches like to drink and smoke, snort, etc for free!
That bum bitch smoked and drank all of my shit and didn't contribute anything. What a bum bitch!