An 'out of the ordinary' individual who just by being themselves, will constantly commit faux pas perceived as lude or inappropriate.
Things a crassmonkey might do:
*Eat Swedish Fish found on a park bench *Pick his nose in public
*Eat the butt end roach of a joint to refrain from wasting pot
*Burp often
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".