Here are some synonyms for insolent:
* Disrespectful
* Impertinent
* Rude
* Saucy
* Impudent
* Arrogant
* Brazen
Examples:
* "The teenager gave an insolent reply to his teacher."
* "She was known for her insolent behavior towards her superiors."
* "The child's insolent remarks angered his parents."
Note: Insolence is often considered a serious offense, especially in formal settings.