verb / noun
yammer
YAM-er/ˈjæmər/
Loud, persistent talk, often in complaint.
The man yammers beside the reader, who winces and shields one ear.

Etymology
Yammer probably comes partly from Middle Dutch jammeren, “to lament,” alongside a related English verb. Its early sense of wailing or shrieking broadened to loud, annoying noise and talk.
More examples
- He yammered about the parking fees all the way home.
- The constant yammer from the next table interrupts our conversation.
- Everyone is yammering at once, and nobody is listening.
Forms
yammer · yammers · yammered · yammering
yammerer noun — Someone who talks loudly and persistently.