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idiot

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noun [countable] idiot pronunciation in British English /ˈɪdiət/ 
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singularidiot
pluralidiots
  1. 1
    informal someone who behaves in an extremely stupid way

    Give that back, you idiot!

    You get a lot of idiots on the road at this time of night.

    Diana suddenly realized what an absolute idiot she had been.

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