rap with (one)
1. To engage in a conversation or discussion with one. The principal said she wanted to rap with me about my plans for after high school. Come on in, Jared. You're not in trouble or anything, I just want to rap with you for a bit.
2. To perform rap music with one. The famous MC got up on stage with the amateur and rapped with him.
rap with someone
Sl. to have a chat with someone or a group of people. (Old.) Come in, sit down, and rap with me for a while. Let's get together and rap with one another sometime.