Paradoxical Filth 

The point in which a person become so filthy that the build up of dirt on their hair and body absorbs their grease, making them appear cleaner than before despite being more dirty.

"Hey, did Roadkill take a shower or something? His hair looks really clean."
"No, it's just paradoxical filth from rolling around in the dirt."

Paradoxical Filth by The Emo Japanese Girl December 27, 2018