coldshoulder
verbUK /ˌkəʊld ˈʃəʊldə/
US /ˌkoʊld ˈʃoʊldər/
To ignore someone on purpose to show you are upset with them.
After their argument, she gave him the cold shoulder for the rest of the day.
OTHER MEANINGS
2. To treat someone in an unfriendly way, especially after a disagreement.
The team cold-shouldered the new player for weeks.
3. To refuse to speak to or acknowledge someone.
He cold-shouldered his old friend at the party.
4. To deliberately show lack of interest in someone's ideas or requests.
The manager cold-shouldered every suggestion from the staff.