Give somebody the cold shoulder
Definition 1 of 1
Pro Tip 1/3Social Disapproval
Used to show disapproval, often by friends or family in social settings when someone is upset with you. 
After the argument, my cousin gave me the cold shoulder at the family dinner.
Pro Tip 2/3Non-Verbal Signal
It's a non-verbal way to express irritation without speaking, through body language or avoiding interaction. 
She didn't say a word, just gave me the cold shoulder when I apologized.
Pro Tip 3/3Quiet Conflict
It subtly shows that there is an unresolved issue, signaling a quiet, indirect form of conflict. 
Despite his smile, everyone could tell he was giving her the cold shoulder.