Source : Webster's Revised Unabridged Dictionary (1913)

Liver \Liv"er\, n.
   1. One who, or that which, lives.

            And try if life be worth the liver's care. --Prior.

   2. A resident; a dweller; as, a liver in Brooklyn.

   3. One whose course of life has some marked characteristic
      (expressed by an adjective); as, a free liver.

   {Fast liver}, one who lives in an extravagant and dissipated
      way.

   {Free liver}, {Good liver}, one given to the pleasures of the
      table.

   {Loose liver}, a person who lives a somewhat dissolute life.