礼れい儀ぎ知しらず

noun which may take the genitive case particle 'no', na-adjective, noun

rude; impolite; ill-mannered

Describes a person or behavior that lacks proper manners or etiquette. Often used as a criticism.

• 彼かれは礼れい儀ぎ知しらずな態たい度どをとった。

  He took a rude attitude.

• そんなことを言いうなんて礼れい儀ぎ知しらずだ。

  It's impolite to say such a thing.