Slang idioms

Bruce's father absconded with the invention that Bruce had made at a very young age and, consequently, become rich. Although he paid for his son's schooling and other material needs, Bruce harbored a lot of resentment toward his father. He and his father had multiple disagreements about the morality of the theft. His father believed that it was fair payment for raising him and he did not agree. When Bruce's father brought the subject up over dinner, his wife admonished him by saying "Why do you have to open old .....?"