Noun
idiot; moron; fool
Usually written using kana alone
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. Na-adjective (keiyodoshi)
stupid; foolish; dull; absurd; ridiculous
Usually written using kana alone
Noun, Na-adjective (keiyodoshi)
trivial; insignificant; disappointing
Usually written using kana alone
malfunctioning; defective; losing sensation
Usually written using kana alone
Noun, Noun, used as a prefix
incredibly; unusually; exceptionally
Usually written using kana aloneSlang
Noun, Noun, used as a suffix, Na-adjective (keiyodoshi)
fervent enthusiast; nut; person singularly obsessed with something
Usually written using kana aloneSlangusu. in compounds
Noun
Mactra chinensis (species of trough shell)
AbbreviationUsually written using kana alonesee 馬鹿貝
Also written 莫迦【ばか】