Not hear of
Definition 1 of 2
Pro Tip 1/3Firm Rejection
Used when someone strongly refuses something, often due to principles or deep convictions. 
He would not hear of cancelling the charity event, no matter the weather.
Pro Tip 2/3Parental Authority
Often used by parents to assert authority over their children's choices or desires. 
My mother would not hear of me going to the concert on a school night.
Pro Tip 3/3Cultural Expectations
Reflects cultural norms when certain actions or thoughts are considered unacceptable. 
In our family, we do not hear of skipping traditional holiday celebrations.