One who sits on the furthest row of seats in a vehicle like a bus, a van, or a car. The term implies (often ironically) that those who sit at the back are "cool" and/or "mischievous".
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".