The feeling you get when your mind is racing, each thought produces a new semi-related thought and you are unable to focus on any single thought. Much like the dialogue in the commercial for Microsoft's semantic search engine Bing.
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.