FLIPPANT

adj. 1 frivolous, facetious, light-hearted, jocular, offhand(ed), unserious, shallow, thoughtless, superficial; supercilious, belittling, scornful, dismissive I don't appreciate your flippant remarks when I'm trying to be serious 2 disrespectful, impudent, impertinent, irreverent, saucy, rude, pert, discourteous, brazen, brash, insolent, Colloq cheeky, flip He disapproves of Charles's flippant attitude towards the royal family