Source : WordNet®

untidy
     adj 1: not neat and tidy; "careless and untidy in her personal
            habits"; "an untidy living room"; "untidy and casual
            about money" [ant: {tidy}]
     2: careless and slovenly
     [also: {untidied}, {untidiest}, {untidier}]

untidiest
     See {untidy}