de rigueur[adjective]Synonyms: decorous, au fait, becoming, comme il faut, correct, decent, done, nice, proper, right
[TahlilGaran] English Synonym Dictionary ▲
de ri‧gueur /də riːˈɡɜː $ -ˈɡɜːr/
adjective [not before noun][
Date: 1800-1900;
Language: French;
Origin: 'of strictness']
considered to be necessary if you want to be accepted, fashionable etc – used humorously:
the gleaming white teeth that are de rigueur for movie stars [TahlilGaran] Dictionary of Contemporary English ▲