attack dog

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attack dog ‎(plural attack dogs)

  1. Any dog bred; trained or used for the purpose of attacking a target, either on command or on sight; trained either as a specialized form of police dog or a security force dog.
  2. A dog used in dogfighting; a bloodsport.
  3. A person who engages in rhetorical attacks on behalf of another.
    • 2001, Mark Jaffe, The Gilded Dinosaur, p. 146:
      It was, however, as Charles Darwin's alter ego, an attack dog for the theory of evolution, that Huxley gained his greatest notoriety.



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