give someone the cold shoulder 对人冷淡；冷待某人

【例句】
You give someone the cold shoulder when your refuse to speak to them.
当你不想与某人讲话时，你会对他冷淡。

We keep getting the cold shoulder from our neighbors these days, because of the argument we had last week.
因为上周和邻居发生争论，这几天来他们一直对我们爱理不理。