The theory that states that one judges a guy/girl's hottness by comparing him/her to those around them. This explains why one would think someone is hotter when seen at, say a movie theater, than at school. There are fewer to compare them to.
Guy 1: Dude, that girl that goes to your school is really hot.
Guy 2: Naw, that's the theory of relative hottness. At school she's not that hot.
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".