sloppyPronunciation: /ˈslɒpi/Translate sloppy | into French | into German | into Italian | into Spanish Definition of sloppy adjective (sloppier, sloppiest) 1(of semi-fluid matter) containing too much liquid; watery:do not make the concrete too sloppy 2careless and unsystematic; excessively casual:we gave away a goal through sloppy defending 3(of a garment) casual and loose-fitting:she wore a sloppy sweater and jeans 4 informal (of literature or behaviour) weakly or foolishly sentimental:lovers of sloppy romanceDerivatives sloppily adverb sloppiness noun sloppy in other Oxford dictionaries Definition of sloppy in the US English dictionary