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"
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.
A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.
British slang for a scientist or technical expert, esp . when the speaker is not certain of the expert’s specific field of study. Not necessarily derogatory, but typically used by persons without a technical background. In the US, the equivalent would be “egghead”, “squint”, or “geek.”
Origin of the word is unknown. Started sometime in World War 2. Given the typical evolution of British slang, could easily have started because what these experts did was confusing or “baffling” to the common person.