Funny if you had asked me this question a few years ago, the answer would have been quite different. i think that growing up i learned from some very sexually repressed people that a "slut" was someone that was promiscuous. However now, i would have to say that a "slut" is someone that is willing to explore all of the possibilities...someone that is open to new experiences, and is willing to leave their comfort zones for the one that they love and trust.
i along with many others would not want for someone that does not love, and understand me to call me a "slut" or a "whore", however if someone that knows and loves me, calls me those names, i find it a term of endearment. i find them truly arousing if a Dominant that i enjoy calls me by those names.