It is a German term meaning "low-earner". It basically describes a person that has a usually simple job that does not pay well or is basically poor. Since around 2019 the term has been developed into an insult towards people who don't have money. You may use it towards a person because of a specific situation, in which a person shows behavior of having a low income, or you use it to describe one's general life situation. It is usually meant in a funny way but may also deeply insult a person.
*two friends want to buy beer: Friend 1: "I don't have enough money on me right now so I will only buy the cheap brand like Karlskrone." Friend 2: "Hahah Geringverdiener!"
*guy with a Porsche is annoyed by a cyclist in front of him: Guy: (honking and overtaking him): "out of the way Geringverdiener"
Geringverdiener is a German word, which main meaning is a person, who doesn’t have a lot of money. After a News Broadcast (Tagesschau) made a social media post about Germanys Youth Word 2021 which went viral, it basically became a meme.
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.