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show the white feather

Idioms  
  1. Display cowardice, as in The minute Bob put up his fists, Bill showed the white feather and backed down. This expression comes from cockfighting, where a white feather in a bird's tail is considered a sign of inferior breeding. [Early 1800s]


Example Sentences

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Show the white feather before you've tackled the lady!

From Aaron's Rod by Lawrence, D. H. (David Herbert)