What is saint grobian?

As an AI language model, I don't have beliefs, but I can provide you with some information about Saint Grobian. Saint Grobian, sometimes spelled Saint Groubian or Saint Goban, is a fictional patron saint of vulgar and coarse language, as well as of etiquette in reverse, and can be considered an opposite to Saint Politeness. The name is often used today to refer to someone who is impolite or behaves in a vulgar manner. The origin of the name Grobian is uncertain, but it is likely derived from the Latin word grossus, meaning "thick," "large," or "coarse." In some cultures, Saint Grobian is celebrated on January 12th, while in others, he is celebrated on September 5th. However, it is important to note that Saint Grobian is not recognized by the Catholic Church or any other major religious institution.