HIP HOP has long been a character in a graffiti. Strong character in a freedom of expression and creativity, of course, in an art.
Back to the questions that match the title, How to make a Hip Hop graffiti text?
Actually you do not need to bother thinking about this because this is actually much easier than you expected. Surely it can be done by using existing technology. NY Graffiti Creator is a Graffiti Creator widget which allows you to make graffiti text then upload it automatically to Myspace/Facebook/Bebo and various social sites.