To JWITP means to poop in your pants. The term originates from back before toilets were domestically available. John Whistle's cunning thought of installing toilets on buses that followed routes, allowing the public to hop on a to drop a deuce.
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".