As usual most of the attempts at defining a 'slut' are vague, most likely based on specious observation and mean-spirited. Might as well say: 'a slut is a woman I don't like because <insert random judgment on objectional behavior performed by person with vagina here>'
Not that I don't have my own judgments...for instance, I am really turned off by people who describe women as sluts in a derogatory way and I will instantly make a judgment on them and their worldview. So I understand the compulsion to jump to conclusions.
I am a slut. I like the word. It conjures up wonderful, joyous ideas for me. It's an attitude I like and I take no little amount of self-satisfaction from it. How I choose to inhabit it is no one's business but my own.
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This is quite delicious...I must incorporate it into something.
b. In playful use, or without serious imputation of bad qualities.
1664 PEPYS Diary 21 Feb., Our little girl Susan is a most admirable slut, and pleases us mightily. 1678 BUNYAN Pilgr. I. 112 As the Mother cries out against her Child in her lap, when she calleth it Slut and naughty Girl, and then falls to hugging and kissing it. 1710-1 SWIFT Lett. (1767) III. 79 Ah! you're a wheedling slut, you be so. 1740-2 RICHARDSON Pamela III. 207 Well did the dear Slut describe the Passion I struggled with. 1846 LANDOR Imag. Conv. I. 233 Nanny, thou art a sweet slut. 1884 GORDON Jrnls. (1885) 115 Why the black sluts would stone me if they thought I meditated such action. transf. 1862 THACKERAY Philip xiii, You see I gave my cousin this dog,..and the little slut remembers me.