How to Say ‘Are you an idiot?’ in Japanese
バカじゃないの？
baka ja nai n
[BAH-kah ja nah-ee noh]
💬 Usage Tip: Ending with じゃないの？ with a rising tone turns a statement into a pointed "isn't it obvious?". The same pattern works elsewhere, as in 変じゃないの？ "isn't that weird?".
Phrase Breakdown
バカ
baka
[BAH-kah]
idiot; stupid
A very common insult meaning fool or stupid; can be harsh or playful depending on tone.
バカなことを言うな。
Don't say stupid things.
じゃ
ja
[ja]
is not
Negative form of the copula, indicating a negative state or action.
それじゃない。
That's not it.
ない
nai
[nah-ee]
not
Negative ending attached to verbs.
今日は行かないです。
I am not going today.
の
n
[noh]
questioning explanatory tone
Adds an explanatory or asking tone, often softening the question.
どうしたの？
What happened?
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