Source : Webster's Revised Unabridged Dictionary (1913)

Whiner \Whin"er\, n.
   One who, or that which, whines.

Source : WordNet®

whiner
     n : a person given to excessive complaints and crying and
         whining [syn: {complainer}, {moaner}, {sniveller}, {crybaby},
          {bellyacher}, {grumbler}, {squawker}]