Ganguro (ガングロギャル): A gyaru with an artificial deep tan and bleached hair. This style was popular in the late 1990s, and early 2000s. The term is no longer used within gal culture. Mostly people out of the loop use it.
Haha. I guess I'm out of the loop. I was partially interested in some ganguro 2D art a while back. I didn't know it was part of something else.