What is the origin of the idiom "mumbo jumbo" and when to use it?

The origin of the idiom "mumbo jumbo" is believed to be the result of the combining of two unrelated terms: "mumbo" and "jumbo." It has its roots in West African religious practices, particularly those of the Mandinka tribe. "Mumbo jumbo" refers to the ceremonial language or chants used by tribal priests in their rituals, which were often unintelligible to outsiders. Over time, the term evolved to describe any language or speech that appears complex, obscure, or nonsensical. Today, "mumbo jumbo" is used figuratively to refer to incomprehensible or confusing language, ideas, or actions.