noun

• (uncountable) A set of spiritual practices and traditions created and concealed from slave-owners by enslaved Africans in North America, based on traditional African beliefs.
• (chiefly US) A practitioner of voodoo.
• (chiefly US) Supernatural bad luck, or something or someone believed to bring bad luck.
  "The three men wondered whether they would find Colson at Taylor's Creek. They felt that a hoodoo hung over the place."
• (geology) A tall thin spire of rock that protrudes from the bottom of arid basins and badlands.
  "It was even larger than the mirage made it look—a dozen miles across and a thousand feet deep, with fins and towers and hoodoos like observation posts, mesas and minor buttes, springs flowing brightly in the red rock."

verb

• (transitive) To jinx; to bring bad luck or misfortune to.