An academic label for someone who adheres to the theories, or methods, of Karl Marx, who proved that society can be studied by science. The term is confused by a lot ignorant asshats who are unable to parse Marxism from small 'c' communism; the latter being a very specific type of society, whereas Marxism is more a way of understanding how the world is shaped by material conditions and the imperatives of class power, which are the real motor forces of history.

Similar to a wife as they both want you to work your ass off to pay their bills while telling you how you are oppressing them.

adj. common term used to describe someone who does not believe what you believe. Note: most abusers of this never read anything by Karl Marx (save maybe his propoganda script) so they generally have no idea what he is all about.

1. An ideology that advocates mass murder in the name of social justice, autocracy in the name of democratic fairness, slave labour camps in the name of proletarian liberation, a rigid social caste system in the name of a classless society, and general social destitution in the name of material prosperity
2. A proto-Nazi

Anyone who disagrees with the then-current economic theories dominating the Republican Party.