The point wherein excessive use of a Blackberry or video game controller results in lactic acid build-up in the thumb, and therefore pain and numbness.
His excessive texting resulted in a rather painful bout of BTS - Blackberry ThumbSyndrome, which actually needed prescription pain medication to remedy.
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".