yellow dog

noun3

1. •
   (US, Southern-US) A Carolina dog.
2. •
   (US, informal) An item or person of low value.

   • If I had a woman like that I'd trade her off for a yellow dog and then shoot the dog. — 1877
3. •
   (US) Ellipsis of Yellow Dog Democrat.

   • What led Rick Perry to pronounce the Yellow Dogs dead? — 2011