A phrase that is used used to signal, perhaps impatiently, a desire for something to begin. It could be a project, a trip, asking someone out--anything for which preparations have been made, and a specific goal is to be achieved.
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".