The study of old people and how they become assholes, and get wrinkles and liver spots. Except of course for your grandparents who give you lots of money at christmas, unless they are assholes, or dead.
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".