decadent
adjective /ˈdekədənt/
  /ˈdekədənt/
(disapproving)- having or showing low standards, especially moral ones, and an interest only in pleasure and fun rather than serious things
- the decadent rich
 - a decadent lifestyle/society
 - There was something very decadent about filling ourselves with so much rich food.
 
Oxford Collocations DictionaryDecadent is used with these nouns:- dessert
 
Word Originmid 19th cent.: from French décadent, from medieval Latin decadentia; related to decay.