Mumbo Jumbo is an expression for what you're saying is totally confusing or meaningless. Example: - I saw a ghost last night. - That's mumbo jumbo! Mumbo Jumbo,is an English phrase or expression that denotes a confusing or meaningless subject. It is often used as humorous expression of criticism of middle-management and civil service non-speak, and of belief in something considered non-existent by the speaker (ghosts, supernatural phenomena, superstitious beliefs, etc.).