WordNet sense 1 (a person whose behavior deviates from what is acceptable especially in sexual behavior):

deviant, deviate, pervert, deviate, pervert

WordNet sense 2 (unrestrained by convention or morality):

debauched, dissipated, dissolute, fast, libertine, profligate, riotous, degraded

WordNet sense 3 (deliberately violating accepted principles of right and wrong):

immoral

WordNet sense 4 (grow worse):

deteriorate, devolve, drop