a weaselsnatcher is a dude who is good at picking up chicks who are "weasely" or "squirrely" : they seem to like you but then get away. A weaselsnatcher is the guy who always seems to get a date with (or go home with) that chick.
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.