カス (kasu)
What does カス (kasu) mean? カス (kasu) is a Japanese severe that translates to “scum / trash / worthless” in English.
Literal Translation
dregs / scum / residue
Meaning & Usage
"scum / trash / worthless"
Compares person to waste/residue left after filtering.
Examples in the Wild
このカスが！(Kono kasu ga! - You scum!)
When to Use It
Context
- Expressing strong frustration or emphasis
- Only among very close friends who share this register
- Direct confrontation (use with caution)
Avoid
- Professional or formal settings
- Around elders or authority figures
- Public spaces — will cause genuine offense
- Job interviews, meetings, or customer-facing situations
Cultural Context
Implies person has no value, is leftover waste. Extremely demeaning. 'Kasugai' (scum) is variant. Used in heated arguments to deny someone's humanity.
More in Japanese 🇯🇵
View all →まんこ (manko)
“cunt / pussy”
Crude slang for female genitalia.
クズ (kuzu)
“trash / scum / piece of shit”
Denotes moral worthlessness. 'Kuzu otoko' (scum man) describes cheating, lying men.
うるさい (urusai)
“shut up / you're annoying / be quiet”
Literally 'noisy,' used to tell someone to be quiet.
糞 (kuso)
“shit / fuck / damn”
The Japanese 'f-word.' Functions as noun, exclamation, and adjective prefix. Most versatile swear word.
野郎 (yarou)
“bastard / jerk / guy (derogatory)”
Originally meant 'fellow' or 'guy,' now derogatory masculine suffix.
嘘つき (usotsuki)
“liar”
Person who tells lies.
クソ野郎 (kusoyarou)
“shithead / asshole / motherfucker”
Compound of 'kuso' (shit) and 'yarou' (bastard).
どけ (doke)
“get out of the way / move it / fuck off”
Rude imperative of 'doku' (to move aside).