A male acquaintance has mentioned it recently. Said it applies to both men and women however.
I have always seen it as a sexist term.
I've told my stepdaughter who would use it that there is no such thing-a woman can sleep with whoever she wants provided she is safe(emotionally as well as physically) and that the term is outdated and sexist.
The man who said this, referred to the female in question of having 4 sexhal partners in the last year.
I asked him if 3 would be not a slag? Two?
What do you think of the word?
I know of its origins to an extent.