The Collaborative International Dictionary of English v.0.48:

juicer \juicer\ n.
   1. a utensil with a conical ridged center that is used for
      squeezing juice fro citrus fruit.

   Syn: reamer, juice reamer.
        [WordNet 1.5]

   2. A state of drunkenness; as, to throw on a juicer; to have
      a juicer on all night.
      [PJC]

   3. An habitual drunkard; one who drinks alcoholic beverages
      frequently to the state of inebriation.
      [PJC]

WordNet (r) 3.0 (2006):

juicer
    n 1: a person who drinks alcoholic beverages (especially to
         excess) [syn: drinker, imbiber, toper, juicer]
         [ant: abstainer, abstinent, nondrinker]
    2: a squeezer with a conical ridged center that is used for
       squeezing juice from citrus fruit [syn: reamer, juicer,
       juice reamer]