fall·ing–out 
/ˌfɑ:lɪŋˈaʊt/ noun
plural fall·ings–out /ˌfɑ:lɪŋˈaʊt/ noun [count] : a serious argument or disagreement
▪ The two actors barely spoke after their bitter falling-out. ▪ He had a falling-out with his parents over money. — see also fall out at 1fall
▪ The two actors barely spoke after their bitter falling-out. ▪ He had a falling-out with his parents over money. — see also fall out at 1fall
