yak at

yak at (one)

To talk to one about trite or meaningless things in an exhausting, tedious, and lengthy manner, especially without letting the other person respond or engage meaningfully. I got stuck sitting next to Randy at the company dinner, who just yakked at me all night about his fantasy football team. If you're just yakking at your clients about a bunch of numbers and graphs, you probably aren't getting them very interested in what you have to say.
See also: yak
Farlex Dictionary of Idioms.

yak at

or yack at
v. Slang
1. To talk at length to someone without regard for his or her interest: My neighbors yakked at me about their new dog for over an hour.
2. To nag someone noisily or peevishly: Her parents yakked at her for getting home so late.
See also: yak
The American Heritage® Dictionary of Phrasal Verbs.
See also:
  • yak at (one)
  • yak on (at one)
  • yammer on (at one)
  • yack on (at one)
  • moralize
  • moralize about
  • moralize about (someone or something)
  • bang away at (someone or something)
  • rigmarole
  • same old rigmarole, the
References in periodicals archive
A project has been launched by the Ministry of Food Security and Research, Islamabad called 'Development of Yak at High Altitude Areas of Pakistan (GB)', which will assist the further growth of yaks in the mountain areas of GB.
Yak - the king of mountains By Sultan Shoaib
Says Dave Robinson, deputy managing editor/sports and operations: "We have seen Heath and the Yak at the same time."
It's a Yak's Life