The Collaborative International Dictionary of English v.0.48:

Swill \Swill\, n.
   1. The wash, or mixture of liquid substances, given to swine;
      hogwash; -- called also swillings.
      [1913 Webster]

   2. Large draughts of liquor; drink taken in excessive
      quantities.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Swill \Swill\, v. t. [imp. & p. p. Swilled; p. pr. & vb. n.
   Swilling.] [OE. swilen to wash, AS. swilian.]
   1. To wash; to drench. [Obs.]
      [1913 Webster]

            As fearfully as doth a galled rock
            O'erhang and jutty his confounded base,
            Swilled with the wild and wasteful ocean. --Shak.
      [1913 Webster]

   2. [Properly, to drink like a pig. See Swill, n.] To drink
      in great draughts; to swallow greedily.
      [1913 Webster]

            Well-dressed people, of both sexes, . . . devouring
            sliced beef, and swilling pork, and punch, and
            cider.                                --Smollett.
      [1913 Webster]

   3. To inebriate; to fill with drink.
      [1913 Webster]

            I should be loth
            To meet the rudeness and swilled insolence
            Of such late wassailers.              --Milton.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Swill \Swill\, v. i.
   To drink greedily or swinishly; to drink to excess. --South.
   [1913 Webster]

WordNet (r) 3.0 (2006):

swill
    n 1: wet feed (especially for pigs) consisting of mostly kitchen
         waste mixed with water or skimmed or sour milk [syn:
         slop, slops, swill, pigswill, pigwash]
    v 1: feed pigs [syn: slop, swill]
    2: drink large quantities of (liquid, especially alcoholic
       drink) [syn: swill, swill down]

Moby Thesaurus II by Grady Ward, 1.0:

179 Moby Thesaurus words for "swill":
   barley, beverage, bib, bilge, bilgewater, bird seed, bones, booze,
   bran, bumper, carrion, cat food, chaff, chicken feed, chop, chug,
   chug-a-lug, clay, corn, crap, culm, deadwood, debris, devour,
   dishwater, ditchwater, dog food, draff, draft, drag, drain,
   drain the cup, dram, dregs, drench, drink, drink in, drink off,
   drink to, drink up, drop, dust, eat, eatage, engorge, engulf,
   ensilage, feed, filings, fodder, forage, garbage, gargle, gash,
   gobble, grain, gulp, gulp down, gumbo, guzzle, hay, hogwash, husks,
   imbibe, ingest, ingurgitate, jigger, jolt, junk, knock back,
   knock off, lap, leavings, lees, libation, liquor, liquor up,
   litter, lush, mash, meal, mire, muck, mud, nip, nonsense, oats,
   offal, offscourings, ooze, orts, parings, pasturage, pasture, peg,
   pet food, pledge, polish off, portion, potation, potion, potsherds,
   provender, pull, punish, put away, put down, quaff, rags,
   raise the elbow, raspings, refuse, riffraff, rot, round,
   round of drinks, rubbish, scourings, scrap iron, scraps, scratch,
   scratch feed, scum, scurf, sewage, sewerage, shards, shavings,
   shift, shot, silage, sip, slack, slag, slime, slip, slob, slop,
   slops, slosh, slough, sludge, slurp, slush, snifter, snort, soak,
   souse, spot, squash, straw, stubble, suck, suck in, suckle, sup,
   swallow, sweepings, swig, swill down, tank up, tares, throw down,
   tipple, toast, tope, toss down, toss off, tot, trash, wash down,
   wastage, waste, waste matter, wastepaper, weeds, wet, wheat,
   wolf down