Etymology:
The word "scum" originally comes from the Old Norse word "skum" (foam), which came from the Proto-Germanic word *skumaz (scum, scale, dross).
Meaning:
Scum can refer to:
Origin:
The concept of scum as a layer of impurities on a liquid goes back to ancient times. In the early 17th century, the term began to be used figuratively to refer to people or things considered worthless or contemptible. By the 19th century, it was commonly used as a derogatory term.
In modern usage, "scum" is often used to refer to criminals, thieves, or other individuals or groups engaged in illicit activities. It can also be used more broadly to describe people considered lazy, immoral, or otherwise undesirable.