cold shoulder
From Longman Dictionary of Contemporary Englishcold shoulderˌcold ˈshoulder noun → (give somebody/get) the cold shoulder —cold shoulder verb [transitive]Examples from the Corpuscold shoulder• Then from then on, we were treated with an absolute cold shoulder, and no one would speak to us.• Rachaela had turned on Ruth, not just the habitual cold shoulder, but with a firework of dislike and alienation.• So they have given girlfriends the cold shoulder.• She was sure that at some point she'd given some one the cold shoulder and hurt them badly without noticing.• A declaration of love, or the cold shoulder.• Banishment was better than this cold shoulder.