The Collaborative International Dictionary of English v.0.48:

Whipper \Whip"per\, n.
   [1913 Webster]
   1. One who whips; especially, an officer who inflicts the
      penalty of legal whipping.
      [1913 Webster]

   2. One who raises coal or merchandise with a tackle from a
      chip's hold. [Eng.]
      [1913 Webster]

   3. (Spinning) A kind of simple willow.
      [1913 Webster]

WordNet (r) 3.0 (2006):

whipper
    n 1: a person who administers punishment by wielding a switch or
         whip [syn: switcher, whipper]