Individuals who take an issue and stick with it or protest it for about a week; a mob of liberal environmentalists concerned about everything but doing little about it
As you walked around the anti-globalization protest, you could hear the animal rights cause-heads chanting "Save the whales!"
by Webster September 30, 2004
One who always feels the need to be protesting or joining some cause such as greenpeace or PeTA. Causeheads are habitual joiners and often end up abandoning a previous cause for another more promising one.
Protestors who always feel the need to jump from one cause to another or a bunch of causes at once are causeheads.
by DennisIsEvil October 15, 2005