flounce

Etymology

Probably of North Germanic origin, from Norwegian flunsa (“hurry”), perhaps ultimately imitative. Or, perhaps formed on the pattern of pounce, bounce.

verb

1. To move in an exaggerated, bouncy manner.
   There was a continual coming and going of flouncing, pig-tailed forms, until the table was closely covered with dishes, scarlet curries with surface currents of ochreous oil, three varieties of what looked like seaweed (inevitably recommended as abundant in vitamins), a paste made of ground beans and chillis... 1952, Norman Lewis, Golden Earth
2. (archaic) To flounder; to make spastic motions.
   With his broad fins and forky tail he laves / The rising surge, and flounces in the waves. 1717, Joseph Addison, Metamorphoses
3. To decorate with a flounce.
4. To depart in a haughty, dramatic way that draws attention to oneself.
   After failing to win the leadership election, he flounced dramatically.
   'Oh certainly,' retorted Tinette impudently, as she flounced out of the room. 1956 [1880], Johanna Spyri, Heidi, translation of original by Eileen Hall, page 67
   You got your ass kicked and instead of admitting you might have made a mistake, you flounced. 2002-09-09, PButler111, “Re: OT - Sept. 11th?”, in alt.fan.barry-manilow (Usenet)
   But love Mensch or hate her, don't buy the line that she merely got bored and flounced: for whatever else she achieved in politics, she was never exactly stuck for ways to make it interesting. 2012-08-07, Gaby Hinsliff, “The lessons of Louise Mensch's departure? There are none”, in The Guardian

noun

1. (sewing) A strip of decorative material, usually pleated, attached along one edge; a ruffle.ᵂ
2. The act of flouncing.
3. A row of spines, corrugations, or skin folds on the hemipenis of a snake.
   2008, David Attenborough, Life in Cold Blood, section 252: