1. when you suddenly get a boner while thinking hard about something
2. when you get a boner when a smart and/or good-looking girl answers a question in class.
1. One year, when I was filing my taxes, I got an intellectual boner.
2. She always answers questions in class and I get an intellectual boner.
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".