From Longman Dictionary of Contemporary Englishschool tieˌschool ˈtie noun [countable] 1 SESDCCa special tie with a particular colour or pattern that children wear at some schools in Britain2 → the old school tie
Examples from the Corpus
school tie• The starter pack included a free school tie, stationery set and complimentary sports insurance.• He comes across as being vaguely aristocratic, patrician, old school tie. 