Source : Webster's Revised Unabridged Dictionary (1913)

Underling \Un"der*ling\, n. [Under + -ling.]
   An inferior person or agent; a subordinate; hence, a mean,
   sorry fellow. --Milton.

         he fault, dear Brutus, is not in our stars, But in
         ourselves, that we are underlings.       --Shak.

Source : WordNet®

underling
     n : an assistant subject to the authority or control of another
         [syn: {subordinate}, {subsidiary}, {foot soldier}]