be (on) non-speakers idiom
UK informal（因有争执而）不说话
If two people are non-speakers or are on non-speakers, they do not talk to each other because they have had an argument.
This usually inseparable pair now appear to be non-speakers.
She is still on non-speakers with me because of what I wrote in my last article. 因为我在上一篇文章中写的内容，她仍然不和我说话。