Since at least 1450, the word slut has been used, often pejoratively, to describe a sexually promiscuous
woman. In and before the Elizabethan and Jacobean eras, terms like "strumpet" and "
whore" were used to describe women deemed promiscuous, as seen for example in John Webster's 1612 play The White Devil.
Souce: The good old Wikipedia, search: Promiscuity.
Usually used when derogatorily referring to females.
In some tribes of Sierra Leone, "A
woman who is a Paramount
Chief may have sexual intercourse with as many men as she pleases."
Being slutty is common in certain animal species; it's social acceptance varies from culture, geographical area to time period.