1
idiot;moron;fool
こんな荒れ模様の日に外出するなんて君は馬鹿だよ。
You are an idiot to go out in this weather.
2
stupid;foolish;dull;absurd;ridiculous
なんという馬鹿なことだろう。
What a piece of folly!
3
trivial;insignificant;disappointing
4
malfunctioning;defective;losing sensation
5
incredibly;unusually;exceptionally
6
fervent enthusiast;nut;person singularly obsessed with something
usu. in compounds
7
Mactra chinensis (species of trough shell)
See also:
バカ貝 (バカガイ)
Other forms
莫迦 【ばか】 (ateji (phonetic) reading) (rarely used kanji form) · 破家 【ばか】 (ateji (phonetic) reading) (search-only kanji form) · 馬稼 【ばか】 (ateji (phonetic) reading) (search-only kanji form)