deaf ear 

When your friend pretends not to hear you and starts talking to someone else, even though they can totally hear you.

Duda is totally giving us deaf ear.

deaf ear by nlm0131 December 6, 2017

turn a deaf ear 

Refuse to hear or listen to something or somebody on purpose.

When you really try to get people to listen and they don't, they obviously want to turn a deaf ear.

turn a deaf ear by Mr. Terrence L. Trezvant April 19, 2005

Talk the ear off a deaf person 

To be able to talk so much that it's frankly absurd. Someone who will be able to essentially hold a conversation completely on their own

Damn dude, you could talk the ear off a deaf person!

Talk the ear off a deaf person by cunteth420 December 1, 2021