Source : Webster's Revised Unabridged Dictionary (1913)

Hoodoo \Hoo"doo\, v. t.
   To be a hoodoo to; to bring bad luck to by occult influence;
   to bewitch. [Colloq., U. S.]

Hoodoo \Hoo"doo\, n.
   A natural rock pile or pinnacle of fantastic shape. [Western
   U. S.]

Hoodoo \Hoo"doo\, n. [Perh. a var. of voodoo.]
   One who causes bad luck. [Colloq.]

Source : WordNet®

hoodoo
     n 1: a column of weathered and eccentrically shaped rock; "a tall
          sandstone hoodoo"
     2: a practitioner of voodoo
     3: a charm superstitiously believed to embody magical powers
        [syn: {juju}, {voodoo}, {fetish}, {fetich}]
     4: something believed to bring bad luck
     v : bring back luck; be a source of misfortune