1. (n.) One who performs poorly, ineptly, or tyrannically in a leadership role of little or no significance.
2. (n.) One who has been promoted to a position above and beyond the limitations of their ability to the detriment of others, esp. one who was hailed as being capable beforehand.
3. (n.) One who is snobbish, rude, or tends to treat others as inferiors
George W. Bush is a fucktarch in both senses one and two.
From being a nice, everyday, uneducated country boy, Jim transmogrified into a corrupt fucktarch after just one term in Congress.
I just got cockblocked by that fucktarch!