voodoo doll

From a mistaken belief that the use of such effigies features in the voodoo religion of either Haiti or Louisiana.

voodoo doll (plural voodoo dolls)

1. A poppet; a doll made to resemble a person in order to cast spells on them or to galvanize some change in them by modifying the doll, often by inserting pins and needles or by binding it.