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 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
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 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 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.
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.