Meaning of yellow dog in English:

yellow dog

noun

informal North American
  • 1A contemptible or cowardly person or thing.

    cross-breed, cross, mixed breed, half-breed, hybrid
  • 2

    (also yellow dog Democrat)
    A person who is inclined to support any candidate affiliated with the Democratic Party, regardless of the candidate's personal qualities or political qualifications.

    ‘he is a self-proclaimed yellow dog Democrat’