bonkers

Unknown. Perhaps from bonk (a blow or punch on the head), perhaps related to earlier bonce.

• (Received Pronunciation) IPA^(key): /ˈbɒŋkəz/
• (General American) IPA^(key): /ˈbɑŋkɚz/

  • Audio (US)

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• Rhymes: -ɒŋkə(ɹ)z

bonkers (comparative more bonkers, superlative most bonkers)

1. (informal, especially British) Mad; crazy.
   • 2021, Paul Waldman, Opinion: The Supreme Court won’t stand up for voting rights. But some state courts will, in: The Washington Post, July 6 2021 (emphasis in original)

     [A]nd we should remind ourselves that it is absolutely bonkers that we elect judges at all; that system is used almost nowhere else on earth[.]

   • 2021 December 29, Paul Clifton, “"Crisis" on the West of England line”, in RAIL, number 947, page 35:

     "They are turning people off travelling. And the removal of catering on such a long-distance route is just bonkers."

bonkers

1. plural of bonker