A group of girls that one would generally agree are filthy or dirty in a sexual sense. May not be a negative even though the word implies a negative connotation. Could be a sarcasticway to say that a girl is hot and (you hope) dirty.
v. Close relative to the "Filthy Folletta" and sometime performed afterwards, A Reverse Filthmosis is performed when a drop of sweat that has beaded down a heavy set woman's ass crack and is caught by the tongue.
Dude I totally gave that huge bitch a Reverse Filthmosis.
You should have seen the look on her face when I gave her that Reverse Filthmosis.
Mom: "What did you learn in biology today?"
Boy: "Reverse Filthmosis."
A disgusting example of the female of our species.
Will have any kind of sex with any kind of person(or any mammal for that matter).
She usually does not wash herself well. And will surly cover her own odor with too much perfume.
She will always stalk her prey and wait until they cant stand on their own before making her move.
This is the girl that goes home with the drunkest guy at the bar and will always cause trout mouth.
Usually pertains to a group of young women aka filthies. Either in a positive or negative content (almost always negative) is she is in the club she is a automatic filthy. If she has a man then she is a filthy fronter.