flippant

a. [ Prov. E. flip to move nimbly; cf. W. llipa soft, limber, pliant, or Icel. fleipa to babble, prattle. Cf. Flip, Fillip, Flap, Flipper. ] 1. Of smooth, fluent, and rapid speech; speaking with ease and rapidity; having a voluble tongue; talkative. [ 1913 Webster ]

It becometh good men, in such cases, to be flippant and free in their speech. Barrow. [ 1913 Webster ]

2. Speaking fluently and confidently, without knowledge or consideration; empty; trifling; inconsiderate; pert; petulant. “Flippant epilogues.” Thomson. [ 1913 Webster ]

To put flippant scorn to the blush. I. Taylor. [ 1913 Webster ]

A sort of flippant, vain discourse. Burke. [ 1913 Webster ]

n. A flippant person. [ R. ] Tennyson. [ 1913 Webster ]