Emry offers various reasons for why "You might be a slut," including "if you've ever used contraception" or "if you're still downloading Dixie Chicks music" or "if you don't go to church." Lovely.
If she were an originalist (which I'm sure she's not), Emry would also include "if you are slovenly or ill dressed woman", which was the eighteenth century definition of a "slut", as used by the Founders. Jefferson, for example, once warned one of his daughters against appearing "dishabille" in public lest she be thought to be a "slut."
I suspect Embry will have about as much success in rehabilitating her four-letter word as the President's campaign will have with respect to his last four years.