Wiktionary
grudge matches
n. (grudge match English)
Usage examples of "grudge matches".
It will be a simple thing to schedule grudge matches between folk who have a common grievance.
Later they would probably show each other their championship medals from grudge matches.
Emperor to feel no need to test herself in private grudge matches.
I don't know if its capable of grudge matches-in fact, I'm sure it isn't-but I also suspect that it was programmed to keep trying to fulfill its goals.