Today's idiom is "give someone the cold shoulder".
It means to ignore someone, usually because you are angry with them.
I said hello to Kana at the party, but she just walked right by me. She gave me the cold shoulder. Is she angry at me?
I was so angry with him, but I didn't say anything. I just gave him the cold shoulder.
A. Did she just give you the cold shoulder ?
B. I think so. Not sure why. Probably because I haven't called her back since our date.