An expression used in circumstances of extreme duress and frustration, when all options are exhausted save physical violence.
Tawnya - Do you sell titties here?
Sales Clerk - I'm sorry, we only carry weaves.
Tawnya - Well, imma knock a bitch out!
sales register at the supermarket
Can I help who's next in line?
Old lady - (cutting in front of line) Oh me! Me!
Tawnya - Oh hell no, did this bitch just... ah hell, imma knock a bitch OUT!