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A woman who can't help being unfaithful no matter who she is with. One who lies and uses excuses in order to go out drinking (see alchy-ho) and hooking up with a random guy or guys (and occasionally a woman) for one night stands.

Someone with great knowledge of penis size because she has had so many, so often. Can be found in bars and hotels across New England. Extremely territorial.
Charlie: "That loud mouth little drunk lady just aked me and that other guy to take her home."
Lucy: "Watch yourself Charlie. She's a Pegupine."
by FYPicture June 17, 2011
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