From a popular song by Pearl Baileyin the early 1950's.
A dishonest, shady person, or scam artist who has found his mate, who complements each other's undesireable behaviour.
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.