Merriam-Webster's Collegiate® Dictionary, 11th Edition
FLOUNCE
I. intransitive verb (flounced; flouncing)
Etymology: perhaps of Scandinavian origin; akin to Norwegian flunsa to hurry
Date: 1542
1. to move with exaggerated jerky or bouncy motions , to go with sudden determination , flounder , struggle ,
II. noun
Date: 1583
an act or instance of flouncing, flouncy adjective
III. transitive verb (flounced; flouncing)
Etymology: alteration of earlier frounce, from Middle English frouncen to curl
Date: 1711
to trim with flounces,
IV. noun
Date: 1713
a strip of fabric attached by one edge, flouncy adjective