Truth Artist
An individual/group of individuals who uses art i. e. graffiti, poetry, song, skits, etc., to "fight the man". They use this art form to let the masses know that they don't have to be a sheep and that you should think for yourself instead of just excepting the norm.
My boy just became truth artist of the year. He tatted up the whole left side of the city council building w/ a protest mural against the policies that are boggin' us down in these hard times.