Black cat bone
A black cat bone is a type of lucky charm used in the magical tradition of hoodoo. It is thought to ensure a variety of positive effects, such as invisibility, good luck, protection from malevolent magic, rebirth after death, and romantic success.
...I got a black cat bone,
I got a mojo too,
I got the John the Conqueror root,
I'm gonna mess with you...
The bone, anointed with Van Van oil, may be carried as a component of a mojo bag; alternatively, without the coating of oil, it is held in the charm-user's mouth.