The very essence of a mare pony, similar to their soul, but something so profound that transcends such a mundane term and thus necessitates its own word.
Just a stupid in-joke that people on the /mlp/ board on 4chan say. It's meant to be an anti-joke, with the idea that people will ask "What's a snowpity?" just to find out it's a nonword that doesn't make sense and that the joke is it doesn't make sense.
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.