Well, it orginally meant a girl who can't keep her legs closed. It still does, but also now girls call each other sluts as a result of jealousy just because the girl who's being called a slut is either a) prettier and gets more attention from guys and people in general or b) she has something the girl calling her a slut doesn't.
Girls call me a slut because they know I'll get more sex in a week than they'll get in their lives
a girl who is mostly drunk at ever party and has sex with 1-3 guys in one night she never dates, cause most of the time she is madly in love with one man who dumped her and moved on and she deals with it by being openly sluty to every person she meets.
She is fucked him!? god she is such a slut!,... yeah but everyone knows it dontgo anywere she want her ex back.
Whore that puts out easily screwing friends over, spouses or anyone that gets in their path. Habitual liars. Most times they come in the forms of bartenders