頭が悪い

Meaning

1. expadj-i
   slow; weak-headed; dumb

Example sentences

• トムは決して頭が悪いわけではない。単なる怠け者なだけだ。

  Tom is by no means unintelligent. He is just lazy.

• ここだけの話だが、彼はだいぶ頭が悪いと思うよ。

  Between ourselves, I think he is rather stupid.

• 頭が悪いね、君。

  You aren't very smart.