Be like talking to a brick wall spoken language adjective phrase
This idiom is informal and only used in spoken language.
It's no use talking to her. It's like talking to a brick wall. She won't listen to you.
Asking them for help is like talking to a brick wall. They are so ruthless.
To argue with somebody
Primally used in the UK to indicate the typical manner of communication from the high social class
Push someone with your finger or elbow to get their attention
To not care in any way about something or someone