A literal reference to the protagonist from the classic American novel, Catcher in the Rye, by JD Salinger, it can be used at parties and social gatherings to inconspicuously ask if anyone has marijuana to sell or share.
Dude 1: "Hey man, did you invite Holden Caufield to the party?"
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".