Shibboleth

definition: a manner of speaking that is distinctive of a particular group of people, often used as a test to ensure or check someone's membership in the group; biblically, used by the Israelites to identify and kill non-Isrealites

example: Say shibboleth to me, or else.

speech part: noun

synonyms:

definition: a favorite saying of a sect or political group

example:

speech part: noun

synonyms: catchword