Source : Webster's Revised Unabridged Dictionary (1913)

Miscreant \Mis"cre*ant\, a.
   1. Holding a false religious faith.

   2. Destitute of conscience; unscrupulous. --Pope.

Miscreant \Mis"cre*ant\, n. [OF. mescreant, F. m['e]cr['e]ant;
   pref. mes- (L. minus less) + p. pr. fr. L. credere to
   believe. See {Creed}.]
   1. One who holds a false religious faith; a misbeliever.
      [Obs.] --Spenser. De Quincey.

            Thou oughtest not to be slothful to the destruction
            of the miscreants, but to constrain them to obey our
            Lord God.                             --Rivers.

   2. One not restrained by Christian principles; an
      unscrupulous villain; a while wretch. --Addison.

Source : WordNet®

miscreant
     n : a person without moral scruples [syn: {reprobate}]