bad job, balk, blunder, bobble, boggle, bonehead play, boner, boo-boo, botch, bungle, clumsy performance, error, etourderie, false move, false step, flub, fluff, foozle, fumble, gaucherie, hash, inadvertence, inadvertency, lapse, lapsus calami, lapsus linguae, loose thread, mess, miscue, misstep, mistake, muff, off day, omission, oversight, sad work, slip, slipup, stumble, trip, wrong step