insolent

英['ɪns(ə)l(ə)nt] 美['ɪnsələnt]

1. marked by casual disrespect;

"a flip answer to serious question"

"the student was kept in for impudent behavior"

2. 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