shibboleth
Pronunciation:
/ˈʃɪbəlɛθ/noun
Definitions
A word, especially seen as a test, to distinguish someone as belonging to a particular nation, class, profession etc.
A common or longstanding belief, custom, or catchphrase associated with a particular group, especially one with little current meaning or truth.
Example: It's about time we abandoned the bourgeois shibboleth that earning money makes you a better person.
Synonyms:platitudeslogantruism