The extreme and absurd application of make-up or any cosmetic products.
Examples are routinely seen in the Hispanic gang culture amongst their women. Some are extreme and take that style to the grave. See "Chola" if there is a description for that.
"Did you see how big her ass was? It was clown big."
"Dammit Dave, I told you to stop styling your hair like WAM! Now it's clown big. You look clown big gay!"