Source : Webster's Revised Unabridged Dictionary (1913)

Bon vivant \Bon" vi`vant"\; pl. {Bons vivants}. [F. bon good +
   vivant, p. pr. of vivre to live.]
   A good fellow; a jovial companion; a free liver.

Source : WordNet®

bon vivant
     n : a person devoted to refined sensuous enjoyment (especially
         good food and drink) [syn: {epicure}, {gourmet}, {gastronome},
          {epicurean}, {foodie}]