slut

First recorded in 1375–1425; late Middle English slutte; compare dialectal slut “mud,” Norwegian (dialectal) slutr “sleet, impure liquid”

In the early 1400s, when slut first appeared in English, it meant roughly what one sense of slattern means today: a slovenly, untidy woman or girl. It also apparently meant “kitchen maid” (”She is a cheerful slut who keeps the pots scrubbed and the fires hot.”). By the end of the 15th century, the sense “a woman given to immoral or improper conduct” had come into use, but this meaning is not current today. Interestingly, slattern also developed the meaning "prostitute, harlot." Some feminists have reclaimed the word slut and use it to mean a sexually liberated woman.