An excellent example of an anti-shibboleth, also known as a "frisco": https://allthingslinguistic.com/post/45448571632/the-opposite-of-a-shibboleth-is-a-frisco

An excellent example of an anti-shibboleth, also known as a "frisco": https://allthingslinguistic.com/post/45448571632/the-opposite-of-a-shibboleth-is-a-frisco https://allthingslinguistic.com/post/45448571632/the-opposit... These signal words act as a silent, passive test of competence in that once you hear them, you can be assured of the speaker's ignorance and discount their opinions accordingly.