Similar to "Take it or leave it"(i.e. "this is your only option") but with a more sardonic edge.
I think this comes from a special edition of the Gilbert Shelton cartoon strip "Fat Freddie's Cat", in which the eponymous character narrowly escapes a genetically modified death at the hands of a mad, well, furrier.
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.