"insolent" in the adjective sense
1. impudent, insolent, snotty-nosed, flip
marked by casual disrespect
"a flip answer to serious question"
"the student was kept in for impudent behavior"
2. audacious, barefaced, bodacious, bald-faced, brassy, brazen, brazen-faced, insolent
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
"the modern world with its quick material successes and insolent belief in the boundless possibilities of progress"- Bertrand Russell
Source: WordNet® (An amazing lexical database of English)
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