Nihilarian (noun): One who does useless work; practicing matters of no importance.
This is an interesting word because it comes from the Latin nihil meaning "nothing." A nihilist (a philosophical term) is one who argues that life is without objective meaning, purpose, or intrinsic value. But if it's his or her work that is without meaning, purpose, or value, he or she is described as a nihilarian.
Which begs the question, is it possible to be an overworked nihilarian and yet not be a nihilist?
Discuss amongst yourselves...