Are you always challenging the establishment? Or provoking popular thought by attacking traditions and institutions? Then you're definitely an iconoclast.
To be called an iconoclast today is usually kind of cool — they're rugged individualists, bold thinkers who don't give a hoot what tradition calls for. But back in medieval Greece, the iconoclasts had a more thuggish reputation. Stemming from the Greek words eikon, meaning "image," and klastes, meaning "breaker," an iconoclast was someone who destroyed religious sculptures and paintings.