A completely stunned cunt. The type of girl who has no idea what she is talking about, but insists on blabbing away to anyone in sight -- especially when she's drunk. Usually a whorish fiend, flippertygibbets lurk shady bars and eateries, looking for an equally trashy skin bag to take home.
Gus: What the fuck, that broad just told me to "get a life!"
Arty: Don't worry about it, she's a total flippertygibbet.