"Anarcho-Primitivist." An anarchist who rejects any technology which destroys the Earth, and aims to return to the Natural human lifestyle. Primies are like hippies, but they are radicals. They love natrural environments and can get depressed in urban areas or staying indoors too long.
"Wanna eat lunch with us in the cafeteria?"
"No, I'm going out to the woods to sit under a tree and eat."