It comes from the name of an Elder of Troy (mentioned in famous Ancient Greek poem, Iliad,) whose house was set afire by the Achaeans when they sacked the city.
Yo lmaooo look at that silly little Ucalegon on the other side of the street
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".