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old boy

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noun [countable] British old boy pronunciation in British English
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singularold boy
pluralold boys
  1. 1
    a man who was a student at a particular school or university
    an old boys’ reunion
    Synonyms and related words
    Synonyms and related words
  2. 2
    informal old-fashioned used by some older men for talking in a friendly way to another man
    What do you think, old boy?
    1. a.
      used for referring to an old man
      The old boy was believed to be a retired bus driver.

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