← BackshareGuesslousily/ˈlaʊ.zɪ.li/adverbIn a very bad, poor, or unsatisfactory way.He performed lousily on the test because he hadn't studied.The hotel was lousily managed, with dirty rooms and rude staff.The team played lousily and lost the game by a huge margin.SynonymsbadlypoorlyterriblyAntonymswell