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.