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idiotic - Wiktionary, the free dictionary

From Wiktionary, the free dictionary

From idiot +‎ -ic.

idiotic (comparative more idiotic, superlative most idiotic)

  1. (of a person or animal) Pertaining to or resembling an idiot; characterised with behaviour resembling idiocy.
  2. (of an action) Having the quality of idiocy; very foolish
    Synonyms: stupid, nonsensical
    • 2005, Sean Dooley, The Big Twitch, Sydney: Allen and Unwin, page 131:

      Everyone else shifted uncomfortably as this guy continued his derisive laughter and proclaimed my quest the most idiotic thing he'd heard in his life.

pertaining to or resembling an idiot

having the quality of idiocy