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.