Source : Webster's Revised Unabridged Dictionary (1913)

Flunky \Flun"ky\, n.; pl. {Flunkies}. [Prob. fr. or akin to
   flank.] [Written also {flunkey}.]
   1. A contemptuous name for a liveried servant or a footman.

   2. One who is obsequious or cringing; a snob.

   3. One easily deceived in buying stocks; an inexperienced and
      unwary jobber. [Cant, U.S.]