yapper
yapper · yappers
A person's mouth, especially one that gossips or talks too muchA person's mouth, especially one that gossips or talks too much.
UK/ˈjæp.ə/US/ˈjæp.ɚ/
Meaning
2 senses(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.