talk to a brick wall

1.
USUKGlobalinformalcolloquial
- To speak to someone who does not listen, respond, or show any interest, so that the effort is wasted.
- To attempt to communicate with a person or group who is unresponsive or impervious to persuasion.
2.
USUKGlobalinformalpejorative
- A dismissive retort meaning 'go away' or 'I will not listen to you,' used to reject or rebuff someone.
- To direct someone to address an unhearing or uninterested recipient as a way of indicating that their words are futile.

Examples: