Source : Webster's Revised Unabridged Dictionary (1913)

Drinker \Drink"er\, n.
   One who drinks; as, the effects of tea on the drinker; also,
   one who drinks spirituous liquors to excess; a drunkard.

   {Drinker moth} (Zo["o]l.), a large British moth ({Odonestis
      potatoria}).