A serious quarrel (especially one that ends a friendship).(noun)
Gnu Collaboartive International Dictionary of English: licensed under The Code Project Open License (CPOL)
Use "bust-up" in a sentence
"Campbell later posted on Twitter: "Match tasty in parts" and said the "so-called bust-up" was "all a bit handbags"."
"We talked at length about civil rights because I thought that could be one of the bust-up points."
"In fairness to Reo-Coker, who was wearing the captain's armband only a couple of months after being told to find another club and a little more than a year after his training ground bust-up with Martin O'Neill, there was much to admire about his part in the build-up."