an attention-getting word or phrase used to publicize something (as a campaign or product) <we knew that their claim of giving “the best deal in town” was just a shibboleth>
an idea or expression that has been used by many people <there's a lot of truth in the shibboleth that if you give some people an inch, they'll take a mile>
Seen & Heard
What made you want to look up shibboleth? Please tell us where you read or heard it (including the quote, if possible).