Something which defies description utterly, is completely transcendental of description to the point where anyone attempting to describe that which is indescriptionable is eventually left hugging themselves in a corner of the room, rocking slowly and drooling while gibbering meaninglessly. A step beyond the merely indescribable.
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.