Pimp style ebonic english for bitch. A Bizyatch is normally a fine piece of female buttocks. On the contrary, the term 'bitch' refers to an extreamly cranky crack-hoe.
another name for a bitch, but used most effectively when you have a bitchy girlfriend that don't like being called a bitch. Tell her that this is the human version, not to be mistaken for 'bitch; female dog'.