The Collaborative International Dictionary of English v.0.48:

Greegree \Gree"gree`\, Grigri \Gri"gri`\, n.
   An African talisman or charm.
   [1913 Webster]

   A greegree man, an African magician or fetich priest.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

gri-gri \gri-gri\ n.
   An African amulet, talisman or charm. Same as gree-gree,

   Syn: gree-gree, gris-gris.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

grigri
    n 1: an African amulet [syn: grigri, gres-gris, greegree]