to yak = (informal, often disapproving) to talk continuously about things that are not very serious or important

People often ask me about my creations, but yaking about images is stupid and boring.

To Yak

 

to gab = to talk for a long time about things that are not important

She should have gone right to sleep last night instead of gabbing for hours.

the gift of the gab = an ability to speak easily and confidently and to persuade people to do what you want

The Gift Of The Gab

 

to dish the dirt on somebody = (informal) to tell people unkind or unpleasant things about somebody, especially about their private life

They don’t want to be seen to be dishing the dirt on them or on any other family members.

To Dish The Dirt

 

to chew the fat = talk socially without exchanging too much information

We went out for a drink, sat and chewed the fat for quite a while.

To Chew The Fat 1

To Chew The Fat 2

 

to listen to the word of mouth = to listen to rumours/to what people say

I wish I would have listened to the “word of mouth” about the poor credentials and awful customer service of this company.

To Listen To The Word Of Mouth

 

straight from the horse’s mouth = if you get information about something from the horse’s mouth, you get it from someone who is involvd in it and knowsa lot about it

I’ve just heard from the horse’s mouth that the house will be sold.

Straight From The Horse S Mouth