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Definition of bust up phrasal verb from the Oxford Advanced Learner's Dictionary

bust up

phrasal verb
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bust up
  1. (informal) (of a couple, friends, partners, etc.) to have an argument and separate synonym break up (with somebody)
    • They bust up after five years of marriage.
    related noun bust-upTopics Opinion and argumentc2
bust something up
  1. (informal) to make a relationship, meeting, etc. end in a way that is not gentle synonym break something up
    • It was his jealousy that bust up his marriage.
See bust up in the Oxford Advanced American Dictionary

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