adj. - Something stupefying, generally used in a positive fashion. Used to denote a level of something so enormous, it's ridiculous almost to the point of being stupid.
Also used as an adv., it is less ubiquitously positive when found in this form.
You check that cat on the sax? He's so good it's stupidacious!
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".