Questions about example sentences with, and the definition and usage of "Scum"

A: Definitions:
1. Worthless person or a group of people
(This definition Is informal and should not be use on anyone else unless it's the person you dont like)

2. A layer of dirt on top of liquid

A: It's just a derogatory/rude thing to call someone, there's no specific meaning
degenerate: having lost good qualities, immoral, corrupt
scum: rude, belittling slang term to call someone

A: thanks

A: literally:

lousy= no good, not good
scum= gross substance, usually they grows or floats in water
a creep= a person who is creepy

it’s a fairly usual insult to call someone “scum” or that they are a “scum sucking” person or a “scum sucker”. So in this case, the Joker is lousy, scum-sucking, and a creep

A: Scum is describing a liquid in which the top layer is covered in a dirt or foam like substance , but the slang version can refer to someone as trash.

A: The pond is covered in scum.
I hate criminal scum like him.

A: I cleaned the soap scum out of the bathtub.

I hate that guy. He is scum.

The pond has a top layer of scum.

The stormtrooper shouted, "Rebel Scum!" at Luke Skywalker.

A: Scum actually isn’t used very much in common English.

Scum has two meanings:
1. Nasty residue
For example: I need to clean the bathtub because there is a lot of soap scum.
The water has a lot of pond scum, due to algae and dirt.

2. Slag for a horrible, worthless person.
For example: That person is scum because they kicked a puppy.
Murderers are scum of the earth. (“Scum of the earth” is a phrase that means really really horrible)

A: 「Those who break the rules are scum, but those who abandon their friends are worse than scum」
-カカシ先生

A: I think these are interchangeable.

A: Scumbag?

A: 문맥에 따라 다를 수 있습니다
Dirtbag
Trash
Piece of sh*t
이런 나쁜 말은 될 거 같애요. 나쁜 사람 의미로 쓰시려고요?

A: × You should often skim the scum on your bathtub.
✓ You should often clean the scum off your bathtub.

Skimは、水の上に浮かんでるもの(scum)を取ること
たとえばライスを煮る時に泡みたいなのとるじゃん、そんな場合はskim使えます
でもあなたが言ってるお風呂にあるscumは水に浮かんでるものではなくてお風呂の底にある汚いやつの話ですよね？
でしたらcleanとかscrub使えます

(説明下手ですみません)

A: Although unkind, to make this make sense, I would say "He is criminal scum."

A: U don't need the "a" it sounds better with "he's acting like scum lately"

A: Talking about people, "scum" is not a good word to use for anybody. As a man, I wouldn't ever refer to anybody as scum.

"Scum" is a noun for a layer of matter on the surface of water. To call anything "scum" as a metaphor would imply it was as worthless as dirt.

A: sitting by (them or him) means sitting near them