The Collaborative International Dictionary of English v.0.48:

Botch \Botch\, n.; pl. Botches. [Same as Boss a stud. For
   senses 2 & 3 cf. D. botsen to beat, akin to E. beat.]
   1. A swelling on the skin; a large ulcerous affection; a
      boil; an eruptive disease. [Obs. or Dial.]
      [1913 Webster]

            Botches and blains must all his flesh emboss.
                                                  --Milton.
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   2. A patch put on, or a part of a garment patched or mended
      in a clumsy manner.
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   3. Work done in a bungling manner; a clumsy performance; a
      piece of work, or a place in work, marred in the doing, or
      not properly finished; a bungle.
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            To leave no rubs nor botches in the work. --Shak.
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The Collaborative International Dictionary of English v.0.48:

Botch \Botch\, v. t. [imp. & p. p. Botched; p. pr. & vb. n.
   Botching.] [See Botch, n.]
   1. To mark with, or as with, botches.
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            Young Hylas, botched with stains.     --Garth.
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   2. To repair; to mend; esp. to patch in a clumsy or imperfect
      manner, as a garment; -- sometimes with up.
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            Sick bodies . . . to be kept and botched up for a
            time.                                 --Robynson
                                                  (More's
                                                  Utopia).
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   3. To put together unsuitably or unskillfully; to express or
      perform in a bungling manner; to bungle; to spoil or mar,
      as by unskillful work.
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            For treason botched in rhyme will be thy bane.
                                                  --Dryden.
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WordNet (r) 3.0 (2006):

botch
    n 1: an embarrassing mistake [syn: blunder, blooper,
         bloomer, bungle, pratfall, foul-up, fuckup,
         flub, botch, boner, boo-boo]
    v 1: make a mess of, destroy or ruin; "I botched the dinner and
         we had to eat out"; "the pianist screwed up the difficult
         passage in the second movement" [syn: botch, bodge,
         bumble, fumble, botch up, muff, blow, flub,
         screw up, ball up, spoil, muck up, bungle,
         fluff, bollix, bollix up, bollocks, bollocks up,
         bobble, mishandle, louse up, foul up, mess up,
         fuck up]

Moby Thesaurus II by Grady Ward, 1.0:

138 Moby Thesaurus words for "botch":
   anamorphosis, bad job, bad likeness, bat out, be all thumbs, bevue,
   bitch up, blight, blow, blunder, blunder away, blunder into,
   blunder on, blunder upon, bobble, boggle, bollix, bonehead play,
   boner, boo-boo, botchery, bugger up, bumble, bungle, bungling,
   burlesque, butcher, caricature, clumsy performance, cobble,
   commit a gaffe, confuse, dash off, daub, destroy, disorder,
   distortion, do anyhow, do by halves, do carelessly, do offhand,
   dub, error, etourderie, fake up, faux pas, fiasco, flounder, flub,
   fluff, flunk, foozle, fudge up, fumble, gaffe, gaucherie, goof up,
   gum up, haphazardness, hash, indiscretion, jury-rig, knock off,
   knock out, knock together, lash up, loose ends, louse up, lumber,
   make a blunder, make a misstep, mangle, mar, mess, mess up,
   messiness, misconduct, miscue, misdraw, mishandle, mismanage,
   mispaint, misspeak, mistake, mix-up, muck, muck up, mucker, muddle,
   muff, mull, murder, muss, mutilate, off day, parody, patch,
   patch together, patch up, play havoc with, play hell with,
   pound out, rough out, roughcast, roughhew, ruin, sad work, scratch,
   screw up, scribble, shambles, slap up, slapdash, slip,
   slipshoddiness, slipshodness, sloppiness, slovenliness,
   slovenly performance, slovenry, sluttishness, solecism, spoil,
   stumble, stupidity, throw off, throw together, tinker, toss off,
   toss out, toss together, travesty, trifle with, trip, untidiness,
   washout, whomp up, wreck



Easton's 1897 Bible Dictionary:

Botch
   the name given in Deut. 28:27, 35 to one of the Egyptian plagues
   (Ex. 9:9). The word so translated is usually rendered "boil"
   (q.v.).