self-satisfied
adjective /ˌself ˈsætɪsfaɪd/
  /ˌself ˈsætɪsfaɪd/
 (disapproving)- too pleased with yourself or your own achievements synonym smug
- He had a self-satisfied smirk on his face.
 - She was so sure of herself, so self-satisfied.
 
Oxford Collocations DictionarySelf-satisfied is used with these nouns:- smirk