A slutty freshman who decides to become your best friend and talk about every guy see sees and talks about boning them. A flagergheist is such a whore there is no other word to explain it.
person 1: yo that new freshman is wearing the most revealing outfit and is all over matt!
person 2: What a flagergheist!
person 2: What a flagergheist!
by kitteyandkat September 19, 2009
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