it’s not that hard to look up the etymology of most words/phrases, and u might learn something new, like you are using a racist phrase and even worse claiming it for the white western country u live in!!! :PPPP
The phrase probably originated from the Mandingo name Maamajomboo, a masked dancer that took part in religious ceremonies. Mungo Park’s travel journal, Travels in the Interior of Africa (1795) describes ‘Mumbo Jumbo’ as a character, complete with “masquerade habit”, that Mandinka males would dress up in order to resolve domestic disputes. In the 18th century mumbo jumbo referred to a West African god.
According to the Concise Oxford English Dictionary:
Mumbo Jumbo is a noun and is the name of a grotesque idol said to have been worshipped by some tribes. In its figurative sense, Mumbo Jumbo is an object of senseless veneration or a meaningless ritual.
Western usage of the term may have formerly carried a degree of racial stereotyping, evoking the casually racist belief in the gullibility of the supposedly childlike Africans, which was widely held when this term was coined. Now, however, this former connection has been forgotten, and it has become a generic term for meaningless ritual or routine.