Real Dictionary

flounce
countable noun: A flounce is a piece of cloth that has been sewn into folds and put around the edge of something, for example a skirt, dress, tablecloth, or curtain.
verb: If you flounce somewhere, you walk there quickly with exaggerated movements, in a way that shows you are annoyed or upset.

flounce in American English 1
the act of flouncing
to move with quick, flinging motions of the body, as in anger
intransitive verb: to go with impatient or impetuous, exaggerated movements
noun: an act or instance of flouncing; a flouncing movement

flounce in American English 2
a piece of cloth, often gathered or pleated, sewn on by its upper edge to a skirt, sleeve, etc.; wide, ornamental ruffle
to trim with a flounce or flounces
noun: a strip of material gathered or pleated and attached at one edge, with the other edge left loose or hanging: used for trimming, as on the edge of a skirt or sleeve or on a curtain, slipcover, etc
transitive verb: to trim with flounces

flounce in British English 1
noun: the act of flouncing
verb: to move or go with emphatic or impatient movements

flounce in British English 2
noun: an ornamental gathered ruffle sewn to a garment by its top edge