ˌold school ˈtie noun the old school tie British English the situation that exists when people who went to the same private school use their influence to help each other get work or other advantages:
a system based on social class and the old school tie [TahlilGaran] Dictionary of Contemporary English ▲
old school tieSee: OLD BOY NETWORK, OLD COLLEGE TRY.
[TahlilGaran] English Idioms Dictionary ▲