Oxford Dictionary English coat-tails nounnoun BrE BrE//ˈkəʊt teɪlz// ; NAmE NAmE//ˈkoʊt teɪlz// [plural] jump to other resultsIdioms on somebody’s coat-tails jump to other resultsusing the success and influence of another person to help yourself become successful She got where she is today on her brother's coat-tails.Check pronunciation: coat-tails oxfordlearnersdictionaries.com