yapper

yap +‎ -er

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yapper (plural yappers)

1. (slang) A person's mouth, especially one that gossips or talks too much.

   Shut your yapper or I'll shut it for you!

2. One who yaps.
   • 2004, Theresa Mancus, Who moved my bone?: a guide for multi-dog households, page 25:

     If you want your pack to be a deterrent against burglars or muggers, forget about small dogs, yappers though they be. Focus on the larger breeds, particularly working stock with strong instinctual drives.

   • 2007, Training, volume 44, numbers 1-10, page 6:

     I have to admit I would have a lot more tolerance for cell phone yappers on my one-hour train ride to and from work if they were actually learning — instead of yelling […]

3. (Can we verify⁽⁺⁾ this sense?) (slang) A dog, especially of a small breed.

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