da shiznit
You're telling everyone your girl is the best. You're basically screaming it in the middle of the mall.
My dad said, 'My biznatch iz da shiznatch' and he was shouting it in the grocery store.
My grandma said, 'My biznatch iz da shiznatch' and she was yelling it at the doctor.
My uncle said, 'My biznatch iz da shiznatch' and he was screaming it at the gym.