Open English Wordnet
Adjectives
(s)impudent, insolent, snotty-nosed, flipmarked by casual disrespect“a flip answer to serious question”, “the student was kept in for impudent behavior”
(s)audacious, barefaced, bodacious, bald-faced, brassy, brazen, brazen-faced, insolentunrestrained 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), “bald-faced lies”, “brazen arrogance”, “the modern world with its quick material successes and insolent belief in the boundless possibilities of progress” (Bertrand Russell)