1) A broad term, it can be used when describing or talking about a group of people who enjoy listening to cheese rock, music that is unworthy of being called music. Also, anyone who separates themselves from other people because they are "unique" even though they really aren't and play in shitty garbage bands and desperately need haircuts.
2) People who need to realize their lives are pointless unless they make drastic changes.
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".
I don't buy the schmegegge about Morty sleeping with Moira.
His version of the story was pure schmegegge.
The whole schmegegge was made up to get Liz a little bit of attention.