From Longman Dictionary of Contemporary Englishmumbo-jumbomum‧bo-jum‧bo /ˌmʌmbəʊ ˈdʒʌmbəʊ $ -boʊ ˈdʒʌmboʊ/ noun [uncountable] informal UNTRUEtechnical language that is difficult to understand and seems to have no sense a bunch of legal mumbo-jumbo
Examples from the Corpus
mumbo-jumbo• You can't do, not when you've been at pains to tell me what rubbish all this astrological mumbo-jumbo is.• legal mumbo-jumbo• Meaningless mumbo-jumbo designed to stall and delay.• Plotinus wrote his most impassioned tract to attack Gnosticism as pretentious mumbo-jumbo.• His daughter Amanda sat at his bedside in stiff, pout-lipped profile, reading some piece of religious mumbo-jumbo.• All of this mumbo-jumbo masks a large vacuum of uncertainty.Origin mumbo-jumbo (1700-1800) Mumbo Jumbo name of a supposed African god 