I didn’t mean to imply calling someone a slut was okay, just that thinking someone is a slut is just an “ick” thing for many.
They are not slut. There’s no reason to think of someone like that. Having more sexual partners than you are being comfortable with doesn’t make someone a slut.
I’d argue that the word means that you care more about having “fun” than having “virtue”, but as long as noone is getting hurt, I see nothing wrong with that. Life is short.