Ah, I see how confused that someone of your intelligence could be. You see, the word "Black" is used to refer to peoples who heritage originates in Africa. These "Black People" or "African Americans" make up roughly 10% of the population of the United States.

Young white males in Pennsylvania tend to wish that they are black and thusly, dress, talk and act like them. However, they are not black and never will be. They cant seem to face this fact, so instead, they take on slang words and attempt to dress similar to the most famous white-guy-who-wishes-he-was-black or "Wigger", Eminem.