Formerly, in the better old days, a business term of art used to describe the insignificant or immaterial numbers or aspects of the business that the PC Police have taken away with most of life's other small pleasures.
Older manager says - these 2 companies are the material ones. All the other ones are mice nuts.
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".