When you hit the public restroom, prior to a long engagement (such as a concert, ballgame, or plane ride), to avoid painful need to urinate, many hours into the event
Primarily for movie goers, the pre-pee is when one goes to the bathroom before getting the movie starts, in order to avoid having to go to the bathroomin the middle of a movie and miss a good part.
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".