As happy as a sandboy is an expression which implies blissful contentment and comes from the days when Publicans in the 17th-19th Century used to spread sand on bar floors to catch slops, spills, spit and so on. They used little boys ie Sandboys, to spread sand on the floor & sweep up the soiled sand. They were 'paid' in ale, normally the slops, which made them drunk/merry/happy.
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.