In a fencing bout when you win 5-0, you have earned the right for your teammates to shout "Eat bagel!" as a celebration because 0 looks like a delicious bagel.
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.