yapper

English

From yap +‎ -er.

yapper (plural yappers)

(slang) A person's mouth, especially one that gossips or talks too much.
Shut your yapper or I'll shut it for you!
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 […]
(Can we verify⁽⁺⁾ this sense?) (slang) A dog, especially of a small breed.