flip ‧ pant /ˈflɪpənt/ BrE AmE adjective
[ Date: 1600-1700 ; Origin: ↑ flip 1 ]
not being serious about something that other people think you should be serious about:
a rather flippant remark
flippant about
You shouldn’t be flippant about such things.
—flippantly adverb
—flippancy noun [uncountable] :
This is no time for flippancy.