whacko

Definitions

Slang

  • adjective (someone who is) crazed, eccentric, insane. This racier version of the colloquial whacky has been heard since the mid-1970s. It was popularised by press references to the singer Michael Jackson as ‘Wacko Jacko’.
  • noun (someone who is) crazed, eccentric, insane. This racier version of the colloquial whacky has been heard since the mid-1970s. It was popularised by press references to the singer Michael Jackson as ‘Wacko Jacko’.
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