The (often unwitting) act of speaking with authority on a subject one has learned about only recently, or at a very surface level.
Omnivore: You don't get enough nutrition and you're gonna get ill
Vegan: are you a nutritionist?
Omnivore: No, this stuff is just accepted fact
Vegan: Stop chubgubbling some bullshit you learnt at school and eat some fucking hummus you twat.
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".