also: にんげんのくず
expression, noun
scum of society; good-for-nothing; vermin
A strong, derogatory expression for a person considered worthless or contemptible. Often used in heated arguments, insults, or dramatic contexts.
あんな人間のクズは初めて見た。
I've never seen such scum of a person before.
彼は詐欺で大勢を騙した、まさに人間のクズだ。
He defrauded many people; he's truly a good-for-nothing.
Compound of 人間 (human) + の (possessive particle) + クズ (trash, scum). The phrase literally means 'human trash' and is used as a strong insult.