Scum is the dirty or foamy layer you see on liquids, like water or sweat. It usually looks like a thin, dirty film on the surface.
There was scum on top of the pond.
Sweat left scum on his shirt after work.
Scum is a rude word for a person who is very bad or dishonest. People use it to show strong dislike.
He treated us like scum and left.
The scum stole money from the shop.
Scum means a layer of bad material that happens when metal gets wet and rusty. It can make metal look dirty and old.
The old pipe had scum from rust.
Scum formed on the metal after rain.
Scum can be a group of tiny plants or algae that float on water. It often looks green and makes water dirty.
The lake was covered in green scum.
Fish do not like swimming near scum.
In slang, scum means a person many people dislike because they act badly or unkindly. It is a very strong negative word.
That scum tricked me again!
Don't trust that scum person.
