A slut-factor is a scale for quantifying the sluttishness of a girl from 0 to 10, with 10 being the 'ultimate slut' with no ethics. A girl with a slut-factor of 0 is a very nice girl.

Different individuals or organizations can create different computation methods to calculate slut-factor.
Girl-1 : Girl-2 has slept with almost all the freshman guys; she has a perfect 10/10 slut-factor.
by cade_skywalker June 7, 2011
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Aussie expression for a girl that is not necessarily pretty, but you would root her because she has a slutty attraction about her.
“Oh Brandy, I’d like to root her, only because she’s got the slut factor”
by Robby101 November 2, 2006
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Virgin Slut Factor n. (vûr j n sl t f k t r) or VSF

The mathematical theory that the number of years one waits to have sex is directly proportionate to the freak level they will attain after copulation. For Example if the going age in your area is 17 and you wait until you are 18 you will probably only have one partner during this first year of discovery. Unlike the one who might wait until they are 27, who might feel that they need to make up for lost time therefore sleeping with 10 people in the first year.
It isn’t Brittany’s fault that she is a total hoochie, her VSF was just too high.
by Imajica21 May 10, 2005
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