30's, 40's phrase used on an uptempo dance tune, as a command to the rhythm section (the drummer is "daddy" as in "daddy-o") to emphasize 8 beats to every bar of music, giving it a feel of doubletime (as opposed to 4 to a bar)
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".