metaphorical (for women mainly) for people who don't have dicks but feel like they should be a guy and that people should suck on their cock. Instead of sucking on cock, you should be more elegant and say swivel on my dick. Usually used when someone is being a little bitch and they need to stop.
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".