More often than not, the word "shibboleth" is used as a pejorative and conveys the first meaning in the Merriam-Webster definition below. "Empty of meaning," "blather," "nonsense."

shib•bo•leth
Function: noun
Etymology:   Hebrew shibbôleth stream; from the use of this word in Judges 12:6 as a test to distinguish Gileadites from Ephraimites
Date: 1638
1 a: a word or saying used by adherents of a party, sect, or belief and usually regarded by others as empty of real meaning (the old shibboleths come rolling off their lips — Joseph Epstein) b: a widely held belief (today this book publishing shibboleth is a myth — L. A. Wood) c: truism, platitude (some truth in the shibboleth that crime does not pay — Lee Rogow)
2 a: a use of language regarded as distinctive of a particular group (accent was…a shibboleth of social class — Vivian Ducat) b: a custom or usage regarded as distinguishing one group from others (for most of the well-to-do in the town, dinner was a shibboleth, its hour dividing mankind — Osbert Sitwell)

Don Firth