A person who can talk the talk but can't walk the walk. Someone who dresses with style, looks like they got it together, and can look like they have expensive taste but when it comes to depth they can't deliver. No real skills, no real talent, even though they got the "look".
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.