Brunettes, red-heads and dark-haired women who dye their hair blonde because they are embarrassed of their hair color. The color winds up growing out in a few weeks leaving them looking like zebras. Artificial and vain. The female analog of bald guys who grow out thin strands of hair on the sides in order to comb it over the top to hide their shiny tops. Term first coined by Michael Mannske in his book "Foreign and Domestic."
"I can see her dark roots from across the bar. I'm tellin' ya, man, stay away from her. She's a comb-over blonde."