quack like a duck

English

Pronunciation

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Verb

quack like a duck (third-person singular simple present quacks like a duck, present participle quacking like a duck, simple past and past participle quacked like a duck)

  1. (simile) To appear to be exactly what one is.
    If it quacks like a duck, it's a duck.
    • 2000 February 1, “From the Electoral College”, in Agapé, volume 2, number 4, page 2:
      If you quack like a duck, then you must be a duck. If you are functioning like a local body, then you must be one.