When a man wants to get a ladys attention, he yells this, thinking he is playa. When in reality, he sounds like a man yelling at a little child who he is about to rape, which would cause the mother figure to be on alert. This causes everyone trouble. Therefore, never say it because you will sound like an ignorant fool.
Example: "Ayyo, fine lady, you wanna holla atchur boi boi?"
"Hell nah, you besstep off wigga"
Real talk. Serious talk. Usually between adolescent teenage boys. On occasion, "Boy to Boy" talk can be among grown men when trying to get each other's serious attention.
Example: Example: You break your ankle jumping over a girl who you were trying to T bag. You scream to your buddy who is laughing and thinks you are kidding, "DUDE! Boy to Boy! I need to go to the ER!".