Mojo

google

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early 20th century: probably of African origin; compare with Gullah moco ‘witchcraft’.

wiktionary

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Probably of Creole origin, cognate with Gullah moco(“witchcraft”), Fula moco'o(“medicine man”)

etymonline

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mojo (n.)

"magic," 1920s, probably of Creole origin; compare Gullah moco "witchcraft," Fula moco'o "medicine man." It was noted in 1935 as an underworld name for "any of the poisonous, habit-forming narcotics."