The act of being a slut. This includes an individual sleeping around and or being promiscuous, multiple sex partners.
Comes from the word "Slut" which was a term used in the Middle Ages to describe a woman who slept around and was promiscuous.
Leeanne: Yeah! Downtown and at all those clubs.
(usually occurs in the female sex)
Girl 2: I thought Stephanie was into Mark? Didn't she talk to you about it?
Girl 1: Yeah, but I went ahead anyway.
Girl 2: If that's not slutting, I don't know what is.
Guy2, " Yea man but it was a bumpy ride..."