Translation guide
A vulgar insult for a contemptible or stupid person. Japanese has many rough insults, but direct translations are rare; the best choice depends on context, gender, and intensity.
Express strong contempt for someone, similar to 'shithead' as a general insult.
Vulgar and strong; literally 'shit bastard'. Commonly used by men. Conveys anger and disrespect.
あのクソ野郎、また遅刻かよ。
That shithead is late again.
Very common insult meaning 'idiot' or 'bastard'. Less vulgar than クソ野郎 but still strong.
この馬鹿野郎が！
You shithead!
Literally 'dregs' or 'scum'. Used as a dismissive insult for a worthless person. Slangy and contemptuous.
お前みたいなカスは消えろ。
Disappear, you shithead.
Call someone a shithead emphasizing their stupidity.
Kansai dialect for 'idiot', but widely understood. Can be used jokingly or offensively. Less vulgar than クソ野郎.
そんな簡単なこともわからないのか、アホ。
You don't even understand something that simple, you shithead.
Standard word for 'fool' or 'idiot'. Can range from mild to strong depending on tone.
バカか、お前は。
Are you a shithead or what?
Express that someone is a shithead because they are irritating or hateful.
Literally 'irritating guy'. A common way to call someone a shithead without using a specific insult word. 奴 (やつ) is casual/rude for 'person'.
あのムカつく奴、また来たよ。
That shithead came again.
Slang for 'annoying person'. ウザい is a shortened form of うざったい (annoying). Very common among young people.
マジでウザい奴だな。
What a shithead, seriously.
There is no direct Japanese equivalent of 'shithead' that matches its nuance exactly. Using クソ頭 (くそあたま) would be nonsensical. Choose an insult based on the specific meaning you want to convey.
クソ頭
shithead (literal, unnatural)
Most of these insults are rough and masculine. Women may use them but risk sounding very coarse. In polite company, avoid these entirely and use milder expressions like 困った人 (こまったひと, 'troublesome person').
あの人は本当に困った人だ。
That person is really a problem (polite).