blunderer
1. [ noun ] someone who makes mistakes because of incompetence
Synonyms: fumbler bumbler sad_sack botcher butcher fuckup stumbler bungler
Related terms: incompetent botch sin
Similar spelling:   blunder
  blinder
  blender
  blunderbuss
  blunder_out
  blonde
  blende
  blinded
  blended
  Blundell
  Blondell
  blantyre
  bluntness
  blindside
  blunted
  blintze