(n) :
a word, especially seen as a test, to distinguish someone as belonging to a particular nation, class, profession etc; a
slogan,
jargon word, or
catchphrase closely associated with a particular group and not used very much, or at all, outside of it. Can also apply to ideas,
customs, and uses of language
"it's about time we abandoned the bourgeois shibboleth that earning money makes you a better person."