yak

A wild, shaggy-haired ox (Bos grunniens) of the mountains of central Asia.

A domesticated yak, used as a work animal or raised for meat and milk.

To talk persistently and meaninglessly; chatter.

Prolonged, sometimes senseless talk; chatter.

The wild ox of Tibet, Poëphagus grunniens, or any of its domesticated varieties; the grunting ox.