Haughty and contemptuous or brutal in behavior or language; overbearing; domineering; grossly rude or disrespectful; saucy; as, an insolent master; an insolent servant.

marked by casual disrespect; "a flip answer to serious question"; "the student was kept in for impudent behavior"

unrestrained by convention or propriety; "an audacious trick to pull"; "a barefaced hypocrite"; "the most bodacious display of tourism this side of Anaheim"- Los Angeles Times; "bold-faced lies"; "brazen arrogance"; "the modern world with its quick material successes and insolent belief in the boundless possibilities of progress"- Bertrand Russell

Proceeding from or characterized by insolence; insulting; as, insolent words or behavior.

Speaking in a way that is insulting and defiant.

Deviating from that which is customary; novel; strange; unusual.