Another unfortunate word. Pronouncing this word is like performing physical comedy. It sounds like a potential name for a gnome or dwarf in Narnia (did gnomes exist in Narnia?).
But, thanks to Merriam-Webster for the interesting info.
: a silly flighty person
She plays a flibbertigibbet on the sitcom, but off the set, she is a no-nonsense woman in full control of her career and family.
Did you know?
“Flibbertigibbet” is one of many incarnations of the Middle English word “flepergebet,” meaning “gossip” or “chatterer.” (Others include “flybbergybe,” “flibber de’ Jibb,” and “flipperty-gibbet.”) It is a word of onomatopoeic origin, created from sounds that were intended to represent meaningless chatter. Shakespeare apparently saw a devilish aspect to a gossipy chatterer; he used “flibbertigibbet” in King Lear as the name of a devil. This use never caught on, but the devilish connotation of the word reappeared over 200 years later when Sir Walter Scott used “Flibbertigibbet” as the nickname of an impish urchin in the novel Kenilworth. The impish meaning derived from Scott’s character was short-lived and was laid to rest by the 19th-century’s end, leaving us with only the “silly flighty person” meaning.