'Flippant' definitions:

Definition of 'flippant'

adjective

Showing inappropriate levity [syn: flippant, light- minded]

From: GCIDE

Flippant \Flip"pant\, 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]

From: GCIDE