1) To completely undermine or destroy anything (up to and including a nation) through untiring dedication to your god, your friends or your own mistaken belief that you are something other than inept.
2) General moral superiority and inflexibility resulting in the fubarification of everything you get involved in
There I am sitting at my desk, thinking about how I will spend the long weekend with my wife and kids, when the army calls telling me I've been bushwacked.