dumb as a rock

English

Pronunciation
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Adjective

(as) dumb as a rock

  1. (US, simile) Very stupid; dumb as a post.
    • 2023 March 15, Brian X. Chen, Nico Grant, Karen Weise, quoting Satya Nadella, “How Siri, Alexa and Google Assistant Lost the A.I. Race”, in The New York Times‎, →ISSN:
      Voice assistants are “dumb as a rock,” Satya Nadella, Microsoft’s chief executive, said in an interview this month with The Financial Times, declaring that newer A.I. would lead the way.

See also
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