flibbertigibbet

noun

1. An offbeat, skittish person; especially said of a young woman.

   “All this responsibility at such an early age made her a bitchy flibbertigibbet.”

2. A flighty person; someone regarded as silly, irresponsible, or scatterbrained, especially someone who chatters or gossips.

   ““Thou flibbertigibbet,” cried Catwezle, who had been listening, “all is clear as springwater. This Rapkyn was a sorcerer!””

   “‘Ignorant girls. Dizzy young things. It seems to be my fate always to be landed with these flibbertigibbets.’”

3. (archaic)An imp, a fiend.