sluttish in WordNet English dictionary

1. characteristic of or befitting a slut or slattern; used especially of women
   blowsy  blowzy  slatternly  sluttish 
   
2. casual and unrestrained in sexual behavior
   "her easy virtue"; "he was told to avoid loose (or light) women"; "wanton behavior"
   easy  light  loose  promiscuous  sluttish  wanton