"Party like a Fireman" is a quote from "The Wrestler" a movie made in 2008 starring Mickey Rourke. Here is what is happening: There is a famous wrestler. After 10 years, he's (kind of) retired. A (fan)girl of his asks if he wants to party. He asks "How do you want to party?" She says "Let's party like a fireman!" Then, you see him and her, in the bathroom, humping fast, standing up.
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.
Looking or experiencing something nice after witnessing something horrid like a disgusting gif or a disturbing video. Typically used as eye bleach are nice images of whatever makes the disturbed person happy.