commonly spelled flibbertigibbet 1) A capricious and unreliable person.
2) a flighty or whimsical person, usually a young female.
3) Historically: a name for a fiend, devil, puck or sprite.
4) Mythology: The name of a particularly obnoxious
apprentice to the Wayland (Weland) smith who was
so irritated by his apprentice threw him down a hill where he was changed into a stone.
In "The sound of Music" Maria is called a flibbertygibbet by the Mother Superior because Maria is out roaming around the hills rather than staying in the convent and behaving as a novice should.
A north west England name for someone who is flashy and female,flaunting sexually. The term comes from the way someone "dances" about when being hung... hence the reference to "jibbet", or gallows