oförskämdhet

Etymology
, like 🇨🇬

Noun

 * 1) being rudely disrespectful; rudeness, impertinence
 * 2) an instance of the above; a rudely disrespectful utterance or expression, an impertinence
 * 1) an instance of the above; a rudely disrespectful utterance or expression, an impertinence

Usage notes
Except for oförskämdhet being a more well-known and less literary word, impertinence is a good match for the meaning.