What is the meaning of Yammer?

To complain peevishly.

To talk loudly and persistently.

To repeat on and on, usually loudly or in complaint.

To make an outcry; to clamor.

to repeatedly call someone's name.

The act or noise of yammering.

A loud noise.

One who yammers.

to lament

to yearn for something

a cry of lamentation

the act of yammering

Source: wiktionary.org