low moral standards or behaviour
decadent - indulgent
Something or somebody that appeals to or is characterized by self-indulgence or moral decay can be described as being ‘decadent’. The word is most commonly used in relation to rich food, or disapprovingly to refer to the corrupting extravagance of a person’s lifestyle, typified by putting pleasure ahead of personal responsibility or well-being.
After achieving success as an actor, Tom fell into a decadent lifestyle of drink and drugs that nearly ruined him.
The chocolate cake I ordered for dessert was clearly jammed with calories. It was pure decadence!
Her whole house was decadently furnished. In my opinion, there is no need for such over-the-top extravagance.