adj. 25B6; adjective FRIVOLOUS, facetious, tongue-in-cheek; disrespectful, irreverent, impudent, cheeky, impertinent; informal flip, saucy, waggish; N. Amer. informal sassy.
serious, respectful.
FLIPPANT
Meaning of FLIPPANT in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012