NEED HELP LEARNING TO SPEAK BLACK?

Were dead set on moving to a lower income neighborhood due to my father losing his job and im terrified of being shanked by the gangs that could possibly live there, i speak in a well mannered way so I am scared the "gangstas" there might notice and mug me or something so i need to learn how to dumb down my speech so they will understand me and will not be aggravated towards me. could somebody teach me a few slang words so i can help to fit in I have already learned the word "Shanked"