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English definition of “fall out”

fall out

(ARGUE) informal phrasal verb with fall     /fɔːl/ US  /fɑːl/ verb (fell, fallen)
B2 to argue with someone and stop being friendly with them: He left home after falling out with his parents. She'd fallen out with her boyfriend over his ex-girlfriend.Arguing and disagreeing
(Definition of fall out (ARGUE) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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