Turn in his/her grave
Definition 1 of 2
Pro Tip 1/3Metaphoric Imagery
The phrase evokes a vivid metaphor of disturbance beyond death, emphasizing strong disapproval. 
Building a mall over the historic park would have him turning in his grave.
Pro Tip 2/3Emotional Intensity
Used for scenarios that greatly contrast deceased individuals' values or beliefs. 
Seeing the old traditions forgotten, our ancestors would turn in their graves.
Pro Tip 3/3Respect and Legacy
It implies a legacy or moral stance as being compromised, leading to the figurative 'grave turning'. 
Her turning the family business into a franchise would have her father turning in his grave.