de rigeur

(formal)

if something is de rigeur, it is necessary if you want to be thought fashionable or if you want to follow a custom Leather jackets and jeans are still de rigeur for hard rock fans.

Common Names:

Name	Pronounced	Usage
Norbaer	nawr-BER	Limburgish
Deforrest	də-FAWR-əst	English (Rare)
Kalysta	kə-LIS-tə	English (Rare)
Cailyn	KAY-lin	English (Modern)
Retha	-	Southern African, Afrikaans, English
Lilibeth	-	English