1.
fool, idiot
A person who lacks intelligence or good judgment; someone who acts foolishly.
馬鹿にしないで。
Don't make fun of me.
馬鹿にする = to make fun of, to look down on
あいつは本当に馬鹿だな。
That guy is really an idiot.
馬鹿を見るのは自分だよ。
You'll be the one who ends up looking foolish.
馬鹿を見る = to be made a fool of
2.
stupid, foolish
Lacking intelligence or common sense; absurd or ridiculous.
馬鹿なことを言うな。
Don't say stupid things.
そんな馬鹿な話があるか。
That's absurd!
馬鹿らしくてやってられない。
It's so ridiculous I can't be bothered.
馬鹿らしい = ridiculous, absurd
3.
crazy about, obsessed with
Extremely devoted to or enthusiastic about something (often with 〜馬鹿).
彼はサッカー馬鹿だ。
He's crazy about soccer.
〜馬鹿 = obsessed with ~
親馬鹿だから、子供のことになると何でも買ってしまう。
I'm such a doting parent that I end up buying anything for my kids.
親馬鹿 = doting parent
彼女は釣り馬鹿で、休みの日はいつも川にいる。
She's obsessed with fishing and is always at the river on her days off.
USAGE: 馬鹿 can be offensive when used directly about a person. However, it's also used affectionately or self-deprecatingly.
COMMON PATTERNS:
- 馬鹿にする (to make fun of, to look down on)
- 馬鹿を見る (to be made a fool of)
- 馬鹿らしい (ridiculous, absurd)
- 〜馬鹿 (obsessed with ~, ~ freak)
COMMON EXPRESSIONS:
- 馬鹿な! (That's absurd! No way!)
- 馬鹿も休み休み言え (Don't talk such nonsense)
- 馬鹿正直 (naively honest)
NOTE: Often written in hiragana (ばか) rather than kanji in casual writing. The word originated as a Buddhist term before taking on its current meaning.
REGIONAL NOTE: In Kansai, アホ is more commonly used than 馬鹿.