{v. phr.} To be so grieved or angry that you would not rest quietly in your grave. * /If your grandfather could see what you're doing now, he would turn over in his grave./
See: TURN IN ONE'S GRAVE.
TURN OVER IN ONE'S GRAVE
Meaning of TURN OVER IN ONE'S GRAVE in English
Dictionary of English idioms . Словарь английских идиом. 2012