カス

• 読み: カス
• ローマ字: kasu
• 漢字の分解: From 粕/滓 (kasu, dregs/sediment/residue). Written in katakana for the slang insult usage
• 発音: /ka.sɯ/

意味

Scum, worthless — a harsh insult meaning someone or something is the absolute lowest quality, like dregs or sediment.

From 粕/滓 (kasu, dregs/sediment/residue left at the bottom), カス is used as a cutting insult for people or things considered utterly worthless. It's harsher than ダメ (no good) or クズ (scrap), carrying a sense of being not just bad but the leftover waste after everything useful has been taken. In gaming culture, it describes terrible plays, items, or pulls. When directed at people, it's a serious insult that can cause real conflict.

例文

1. 人の悪口ばっかり言う奴はカスだよ。
2. あのプレイはカスすぎて笑えない。
3. カスみたいな扱いされて腹立った。

使い方ガイド

場面: internet, gaming, casual conversation

トーン: aggressive, contemptuous

正しい言い方

• 自分のことカスだと思ってたけど、最近ちょっとマシになった。 (I used to think I was worthless, but I've gotten a little better recently.)
• カスみたいなガチャ結果で萎えた。 (My gacha results were garbage and I lost all motivation.)

避ける言い方

• 人に「カス」と直接言うのは喧嘩を売っているのと同じ (Calling someone カス to their face is essentially picking a fight)

よくある間違い

• Thinking カス is mild or playful — it's a genuinely harsh insult, stronger than ダメ or 下手
• Not knowing the compound forms: ゴミカス (garbage scum), 人間のカス (human scum/dregs of humanity)

起源と歴史

From 粕/滓 (kasu, dregs/sediment/residue). Originally referred to the leftover waste from brewing sake or pressing oil. The metaphorical use as an insult for worthless people or things has been in Japanese for centuries.

文化的背景

時代: Long-standing insult, amplified by internet culture

世代: All ages

社会的背景: Universal (negative)

地域メモ: Used nationwide. The brewing/sake origin (酒粕 = sake lees) is part of traditional Japanese vocabulary.