so-and-so - definition and synonyms

noun informal 

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singularso-and-so
pluralso-and-sos
  1. 1
    [uncountable] used for referring to someone whose name you do not know. You can refer to a thing whose name you do not know as such-and-such

    All they ever do is gossip: so-and-so said such-and-such, and blah, blah, blah.

  2. 2
    [countable] an unpleasant person. People use this word to avoid using an impolite or offensive word

    He’s such a miserable so-and-so.