Meaning: If you describe what someone says or writes as mumbo jumbo, you think it doesn't make sense or it's not clear because it's too complex.
- The good thing about Steven's book on physics is that he tries to avoid all that scientific mumbo jumbo that most people can't understand.
- Have you ever heard the sort of mumbo jumbo that lawyers speak when they're discussing a case?
I went to a discussion about modern literature, but it all sounded like mumbo jumbo to me. I really couldn't