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
Ione	ie-O-nee (English), IE-o-nee (English), ie-ON (English)	Greek Mythology, English
HỮU	-	Vietnamese
Florette	-	French (Rare)
Candela	kahn-DE-lah	Spanish
Augustyn	ow-GUWS-tin	Polish
Reba	['ri:bə]