a custom, principle, or belief distinguishing a particular class or group of people, especially a long-standing one regarded as outmoded or no longer important 过时的风俗(或准则、信仰) Labour's socialist shibboleths. 工党过时的社会主义信仰。
语源
mid 17th cent.: from Hebrew šibbōleṯ 'ear of corn', used as a test of nationality by its difficult pronunciation (Judg. 12:6)