Source : Webster's Revised Unabridged Dictionary (1913)

Flogger \Flog"ger\, n.
   1. One who flogs.

   2. A kind of mallet for beating the bung stave of a cask to
      start the bung. --Knight.

Source : WordNet®

flogger
     n : a torturer who flogs or scourges (especially an official
         whose duty is to whip offenders) [syn: {scourger}]