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.]
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            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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