This is a doric phrase that comes from people who keep racing pigeons. The phrase means "Hows your pigeons?" the normal reply would be "Aye peckin aye peckin" which means "Always pecking, always pecking".
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.