Source : Webster's Revised Unabridged Dictionary (1913)

Imbiber \Im*bib"er\, n.
   One who, or that which, imbibes.

Source : WordNet®

imbiber
     n : a person who drinks alcoholic beverages (especially to
         excess) [syn: {drinker}, {toper}, {juicer}] [ant: {abstainer}]