Doo-rags* have been de rigueur in African-American culture since the eighties in the larger cities of Alabama. The origin of this term was in the chicken plants and foundries and restaurants where covering the hair was mandatory for obvious reasons of safety and health.
Then, with the advent of heat-set hair styling for the black male, the practice of covering the head was extended to every-day wear and became "cool".

So while still protecting the expensive hair "doos" these coverings became more colorful, and chic and stylish in their on right, and like music and manner, many rebellious white adolescents imitate the current style of hip-hop talk, walk, and dress.

Another interesting term describing a type of Afro-American dress is "muckers". Can anyone venture a guess?

* As the term was mostly spoken and rarely written, the correct spelling is a matter of style, doo not you think?