頭あたまが悪わるい

expression, i-adjective

not smart; slow; dumb

Colloquial expression meaning someone is not intelligent or slow-witted. Often used in casual, sometimes blunt, contexts. The antonym is 頭が良い.

See also: 頭の悪い

Antonyms: 頭がいい

• 彼かれは頭あたまが悪わるいから、説せつ明めいしてもわからないかもしれない。

  He's not very bright, so he might not understand even if you explain it.

• あの子こは頭あたまが悪わるいわけじゃない。ただ勉べん強きょうが嫌きらいなだけだ。

  That kid isn't dumb; he just hates studying.