Difference between Frivolous and Flippant

FRIVOLOUS vs FLIPPANT: NOUN

Unworthy of serious attention; trivial.
Inappropriately silly.
Of little weight or importance; not worth notice; slight.
Given to trifling; marked with unbecoming levity; silly; interested especially in trifling matters.
Silly, especially at an inappropriate time or in an inappropriate manner.
Not serious in content or attitude or behavior

Showing inappropriate levity
Talkative; voluble.
Of smooth, fluent, and rapid speech; speaking with ease and rapidity; having a voluble tongue; talkative.
Speaking fluently and confidently, without knowledge or consideration; empty; trifling; inconsiderate; pert; petulant.
Glib.
Nimble; limber.
Lacking respect or seriousness, showing levity; pert.
Marked by disrespectful levity or casualness; pert.

Of little weight, worth, or importance; not worth notice; slight; trifling; trivial: as, a frivolous argument; a frivolous objection or pretext.
Given to trifling; characterized by unbecoming levity; silly; weak.
Specifically, in law, so clearly insufficient as to need no argument to show its weakness: as, a frivolous answer or plea.

Of a light and trifling quality; shallow; pert; disrespectful.
Voluble and confident, without due knowledge or consideration; talkative and forward; impertinent; disrespectfully smart in speech or conduct.
Lively and fluent in speech; speaking freely; talkative; communicative.

Vexatious, Light minded, Light headed, Featherbrained, Empty headed, Flyaway, Light, Dizzy, Idle, Giddy, Flighty, Airheaded, Flippant, Trivial, Silly

Silly, Snarky, Tactless, Facetious, Dismissive, Sarcastic, Airy, Breezy, Casual, Careless, Irresponsible, Cavalier, Glib, Light minded, Frivolous

Vexatious, Light minded, Light headed, Featherbrained, Empty headed, Flyaway, Light, Dizzy, Idle, Giddy, Flighty, Airheaded, Flippant, Trivial, Silly

Silly, Snarky, Tactless, Facetious, Dismissive, Sarcastic, Airy, Breezy, Casual, Careless, Irresponsible, Cavalier, Glib, Light minded, Frivolous

The Prison Litigation Reform Act is working effectively to control frivolous prisoner litigation across the board, without barring meritorious claims equally with frivolous ones.
Up and down the line are borderline frivolous sometimes at best and outright frivolous at worst.
The example given is that of filing a frivolous pleading as instructed; there would be no liability unless the subordinate knew it was frivolous.
In determining whether an appeal is frivolous, this court may consider whether other state courts have determined similar claims to be frivolous.
She insulted the new attorney in email and frustrated me with frivolous filing after frivolous filing.
Frivolous spending is frivolous spending, no matter how you look at it.
Stop Frivolous Lawsuits Act, seems to have discovered a new fundraising tool: frivolous lawsuits.
Frivolous conduct includes the making of a frivolous motion for costs or sanctions under this section.
The female voice was deemed frivolous, frivolous bubble even, trivial chatter and dignified drivel.
Claims of Privileges Made for Frivolous Purposes Most claims made for frivolous purposes are at the same time substantively frivolous.

I've been horribly flippant about it but that was just to cover up.
Much flippant writing, and many interesting topics touched on but not presented properly.
Bible put in one flippant comment that I made about a moan.
Elisa that especially the flippant take on polygamy is absolutely terrible.
Your flippant nature and birthday wishes had augmented the fun furthermore.
Write in a way that conveys confidence without being flippant.
Amazing to have the flippant hypocrisy so on display.
Five flippant Frenchmen fly from France for fashions.
His flippant remarks were off the hook funny.
Humour can make you look cheeky and flippant.