脳のう無なし

noun, noun which may take the genitive case particle 'no'

idiot; moron; blockhead

A derogatory term for a stupid person, literally 'brainless'. Used as a noun or with の to modify another noun.

• あんな脳のう無なしの言いうことを真まに受うけるな。

  Don't take what that idiot says seriously.

• 彼かれは脳のう無なしだから、何なにを言いっても無む駄だだ。

  He's a moron, so it's useless no matter what you say.