A radical person (usually liberal or a hippie) who deliberately takes extreme actions in order to "save the environment", when there are already processes underway and have been underway for many years now.
the hippie environmentalist wacko actually lived in a tree for 3 years to keep it from being chopped down.
by A Midwestern Christian May 22, 2005
A slur used by conservatives and/or people who enjoy destroying the environment in the name of progress against people who believe in protecting the environment and saving the Earth for future generations.
Howard called me an environmentalist wacko because I believe that the Redwoods shouldn't be cut down.
by OneBadAsp October 26, 2006