Meaning of “bust up” in the English Dictionary

"bust up" in British English

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bust up

mainly US informal
phrasal verb with bust uk /bʌst/ us /bʌst/ verb [ T ] busted or UK also bust, busted or UK also bust

If a relationship busts up, or the people in a relationship bust up, the relationship ends:

They busted up last year.

bust-upnoun [ C ]

uk /ˈbʌst.ʌp/ us /ˈbʌst.ʌp/ informal

a serious argument, especially one that ends a relationship:

She had a big bust-up with her brother-in-law.

(Definition of “bust up” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"bust-up" in Business English

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bust-upnoun [ C ]

uk /ˈbʌstʌp/ us

UK informal a serious argument or disagreement, especially one which ends a relationship:

The CEO was ousted last month after a boardroom bust-up.

(Definition of “bust-up” from the Cambridge Business English Dictionary © Cambridge University Press)