(くず)

くず
noun
scrap, waste, dregs, trash
1. scrap, waste material
Small leftover pieces or fragments from something; materials no longer useful.
I picked up the scraps of paper and threw them away.
Scrap iron can be recycled.
We collect and dispose of the wood shavings from the factory.
2. worthless person (derogatory)
A derogatory term for a person considered to be useless or of low character.
That guy is human trash.
[Note: Very harsh, derogatory expression]
If you casually break promises, you can't blame people for thinking you're scum.
Even though he was called the scum of society, he didn't care.

(くず) means scraps, waste, or refuse. It often appears in compounds referring to specific types of waste material.

COMMON COMPOUNDS:

INSULTING USAGE:
When applied to people, (くず) is extremely derogatory — equivalent to calling someone "scum" or "trash." This usage is common in manga, anime, and online speech, but is very offensive in real life.

WRITING:
Often written in hiragana (くず) or katakana (クズ), especially in the insulting sense. The kanji (くず) appears more in formal or compound usage.