Anything that causes intestinal problems. Something that causes a bad case of diarrhea, gas, cramps, constipation, etc. A euphemism for bowel problems.
Man, that 4th chili dog with onion cheese tots was bad for business!
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".