The definition of a bum bitch nigga is almost like a bum bitch but worse mainly because they're male. A bum bitch nigga is someone that lives at they mommas house past the age of 40, stirs up a bunch of drama instead of trying to get their life together, thinks that everyone & they momma owes them something, can't find or keep a job can't keep a whip, & depends on everyone to carry their load along with the weight another is already carrying. These people are a waste of life and space. A bum bitch nigga will also lie and steal from the hand that feeds them while taking advantage of the naive.
A: "What's up man you going to Tom's later."
B: " Hell na I see through that bum bitch nigga like a window.ol bum bitch ass nigga."
A term used to describe a male urinating while standing up but opting to lower both their trousers/shorts and underwear, fully exposing their bum in the process, rather than simply unzipping or lowering the front portion of their clothing for urination convenience.
That man is at least 40, can you believe he's doing a Bum-Wee in public