頭あたまのおかしい

expression, noun-modifying (irregular)

insane; crazy; nuts; out of one's mind

Used to describe someone whose thinking or behavior is irrational or mentally unstable. Often carries a strong, informal, and somewhat derogatory tone. Compare with 頭がおかしい, which is a full clause rather than a prenominal modifier.

See also: 頭がおかしい

• 彼かれは頭あたまのおかしい人ひとだと思おもわれている。

  He is thought to be a crazy person.

• そんな頭あたまのおかしい計けい画かくに賛さん成せいできるわけがない。

  There's no way I can agree to such an insane plan.