This is a combination of "to blow my top" and "to lose my shit". The typical usage is in text messages between friends who are angry with their spouses and need to vent.
"My damn wife asked me to return something to the store, but she hasn't got off the phone to tell me what it is. I am about toblose it with her."
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.