頭あたまの弱よわい

expression, i-adjective

dim-witted; slow; simple-minded

A colloquial, mildly derogatory expression for someone who is not intelligent or slow to understand. Often used in casual speech.

• 彼かれは頭あたまの弱よわい人ひとだから、難むずかしい話はなしはしないほうがいい。

  He's a bit slow, so it's better not to talk about complicated things.

• あの子こは頭あたまの弱よわい子こじゃない。ただ勉べん強きょうが嫌きらいなだけだ。

  That kid isn't dim-witted; he just hates studying.