“Then said they unto him, Say now Shibboleth: and he said Sibboleth: for he could not frame to pronounce it right. Then they took him, and slew him at the passages of Jordan: and there fell at that time of the Ephraimites forty and two thousand.”
– Judges 12:6, King James Bible
The word “shibboleth” in English has come to mean a word or phrase that insiders know and use but that outsiders do not. For the last few decades, leftists have been rolling out new shibboleths like Apple rolls out iPhones.