WordWeb Online

1. Someone who makes mistakes because of incompetence
   - bungler, blunderer, fumbler, bumbler, stumbler, sad sack [N. Amer], botcher, butcher
    
2. An embarrassing mistake
   - blunder, blooper [N. Amer], bloomer, bungle, pratfall, foul-up, flub [N. Amer], botch, boner, boo-boo, blue [Austral, NZ]

1. Make a mess of, destroy or ruin
   - botch, bodge [Brit], bumble, fumble, botch up, muff, blow, flub [N. Amer], screw up, ball up, spoil, muck up, bungle, fluff, bobble [N. Amer], mishandle, louse up, foul up, mess up, bugger, balls up

Derived forms: fucked up, fucks up, fuckups, fucking up

Type of: error, fail, fault, go wrong, incompetent, incompetent person, miscarry, mistake