ecofreak

[ ek-oh-freek, ee-koh- ]
/ ˈɛk oʊˌfrik, ˈi koʊ- /

noun Slang: Often Disparaging.

a zealous or overly zealous environmentalist or preservationist.

Origin of ecofreak

First recorded in 1965–70; eco- + freak1

usage note for ecofreak

This term is often used with disparaging intent, as shown in contexts where the person is being described as too extreme, hypocritical, impractical, etc.