botcher

from WordNet (r) 3.0 (2006)

botcher
    n 1: someone who makes mistakes because of incompetence [syn:
         {bungler}, {blunderer}, {fumbler}, {bumbler}, {stumbler},
         {sad sack}, {botcher}, {butcher}, {fuckup}]

from The Collaborative International Dictionary of English v.0.48

Botcher \Botch"er\, n.
   1. One who mends or patches, esp. a tailor or cobbler.
      --Shak.
      [1913 Webster]

   2. A clumsy or careless workman; a bungler.
      [1913 Webster]

   3. (Zool.) A young salmon; a grilse.
      [1913 Webster]