id·i·ot·ic /ˌɪdiˈɑtɪk/
  (a.)白痴的,愚蠢的,獃頭獃腦的
  Id·i·ot·ic Id·i·ot·ic·al a.
  1. Common; simple. [Obs.]
  2. Pertaining to, or like, an idiot; characterized by idiocy; foolish; fatuous; as, an idiotic person, speech, laugh, or action.
  ◄ ►
  idiotic
       adj 1: insanely irresponsible; "an idiotic idea" [syn: crackbrained]
       2: completely devoid of wisdom or good sense; "the absurd
          excuse that the dog ate his homework"; "that's a cockeyed
          idea"; "ask a nonsensical question and get a nonsensical
          answer"; "a contribution so small as to be laughable"; "it
          is ludicrous to call a cottage a mansion"; "a preposterous
          attempt to turn back the pages of history"; "her conceited
          assumption of universal interest in her rather dull
          children was ridiculous" [syn: absurd, cockeyed, derisory,
           laughable, ludicrous, nonsensical, preposterous,
          ridiculous]
       3: having a mental age of three to seven years [syn: imbecile,
           imbecilic]