Bad Juju, Bwana

I know exactly when I heard this expression for the first time. It was in an old Tarzan movie with Johnny W. and was spoken by a native guide to one of the white safari guys to warm him that a certain path led to danger. I have an idea it means something else these days. This is a 6 by 4.5 inches gel pen with color pencil drawing on medium bond acid-free paper. I guess there is good juju as well as bad but Original Jones Art doesn't find much of it in northwest Austin, Texas.