A group sex act, wherein all participants don WW2 era (leather/latex/etc.) fetish clothing and/or Steam Punk inspired sex toys. There is a Fight Club/Vegas rule barring all involved from speaking about any activities to anyone who was not present.
Bob: Hey, Jim, you look worn out. Rough weekend?
Jim: I'm fine. Just not feeling well.
Sue, whispering to Jim: That was a great Secret Nazi Treasure Train we did up Saturday night. I still can't feel my nipples.
Jim: Shhhh!
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.