cold shoulder

• cold-shoulder
• coldshoulder

Possibly coined by Sir Walter Scott in 1816, from give someone the cold shoulder.

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cold shoulder (plural cold shoulders)

1. (idiomatic) A deliberate act of disrespect; a slight or snub.

• give someone the cold shoulder

cold shoulder (third-person singular simple present cold shoulders, present participle cold shouldering, simple past and past participle cold shouldered)

1. (idiomatic) To deliberately slight or snub someone.