A lunatic with retardation. The word usually applies to drivers. The word that comes to you while watching a driver in Washington or California stop the entire flow of traffic to let someone out of a parking lot. Or a driver that gets into the right lane from behind you only to cut you off because they had to turn left.
Someone who is addicted to obtaining money and building wealth. A money addict and fanatic. Breadheads often work more than one full-time job, and some even participate in illicit activities to "obtain the bread".