A person against progress in the first world. Environmentalists generally are jealous people who couldn't care less about the planet, but just want to take down large businesses. These people like rioting, protesting, and all round anarchy. This is because they have nothing better to do with there lives.
Tom: I'm going to protest with greenpeace for the protection of the invisible 1mm fish off the coast of china
Dick: Yeah, can't wait to bring Microsoft down; I am an environmentalist who hates any form of progress!