If you feel the need to say something is the "bee's knees" or "the dogs bollocks", it is much cooler to say it's "the cow's toes"... or at least it will be in ten years time!
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".