Definition of "juju"

Pendants round the neck, bangles round the wrists or ankles, potatoes or nutmegs in the pocket are as old or older than civilisation, carrying the same prophylactic magic as any juju in an African witchdoctor's armamentarium.

1976 March 27, F. Dudley Hart, “History of the treatment of rheumatoid arthritis”, in British Medical Journal, volume 1, number 6012, page 763

They are believed to be "Ju-Ju" or were-leopards, and in this guise to roam through the forest in bands, bent on evil and destruction.

1936, Rollo Ahmed, The Black Art, London: Long, page 168

The party had nominal hosts, all famous, but the real hostess, as everyone knew, was La Doll, who had more connections and access and juju than all of those people combined.

2010, Jennifer Egan, “Selling the General”, in A Visit from the Goon Squad

The blues juju—or jou-jou—relies upon the enjoyment of desires that cannot be satisfied.

2018, Mark Fisher, “it doesn't matter if we all die: the cure's unholy trinity”, in Darren Ambrose, editor, K-punk: the collected and unpublished writings of Mark Fisher (2004–2016), London: Repeater Books

‘I knew a guy once who smoked jujus,’ she said. ‘Three highballs and three sticks of tea and it took a pipe wrench to get him off the chandelier.’

1940, Raymond Chandler, Farewell, My Lovely, Penguin, published 2010, page 75