Where?
"Slut" is nothing but a hate word used by the mentally enfeebled and the weak to describe women who naturally attract power and authority, or who have humiliated their accusers to the point of such hysteria that the only form of defense by the accuser is to resort to an archaic definition of women.
In my opinion, a slut is a woman (or in the case of a man - male slut) who enjoys casual sex with anyone they choose to have sex with. It's only a derogatory term to those who have sexual morals. To those of us who don't have sexual morals, it's no different than defining it as two consenting adults agreeing to sleep together without any further commitment.