mumbo jumbo (n.)youdaoicibaDictYouDict[mumbo jumbo 词源字典]
1738, name of an idol supposedly worshipped by certain tribes in Africa; said to be a corruption of words in Mandingo (one reconstructed version is Mama Dyumbo), but no likely source has been found in the languages of the Niger region, to which the original accounts relate. Meaning "big, empty talk" is attested from 1896.[mumbo jumbo etymology, mumbo jumbo origin, 英语词源]