It's a play on the name of a popular youtuber and offlinetv member Sykkuno, coined by DrGamerArko a R3vivalX member for another fellow member Saikat to name his alias Saikuno, it's also a homophone for 'sike uno' which is a very popular meme reference.
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.