Adjective

(en adjective)

(archaic) glib; speaking with ease and rapidity

* Barrow

It becometh good men, in such cases, to be flippant and free in their speech.

nimble; limber.

Showing disrespect through a casual attitude, levity, and a lack of due seriousness; pert.

* Burke

a sort of flippant , vain discourse

* 1998 , , The Metaphysical Touch

The conversations had grown more adult over the years—she was less flippant , at least.

* 2000 , Anthony Howard and Jason Cowley, Decline and Fall, New Statesman, March 13, 2000

In the mid-1950s we both wrote for the same weekly, where her contributions were a good deal more serious and less flippant than mine.

* 2004 , , The Easy Way to Stop Smoking , page 147

Our society treats smoking flippantly as a slightly distasteful habit that can injure your health. It is not. It is drug addiction.

Adjective

(er)

Deficient in physical strength; weak; infirm; debilitated.

Though she appeared old and feeble , she could still throw a ball.

* {{quote-news

, year=2011 , date=October 23 , author=Tom Fordyce , title=2011 Rugby World Cup final: New Zealand 8-7 France , work=BBC Sport citation , page= , passage=France were transformed from the feeble , divided unit that had squeaked past Wales in the semi-final, their half-backs finding the corners with beautifully judged kicks from hand, the forwards making yards with every drive and a reorganised Kiwi line-out beginning to malfunction.}}

Lacking force, vigor, or efficiency in action or expression; faint.

That was a feeble excuse for an example.