what defines a slut?

I'm not a feminist. I don't want to be. Nor will I ever be. We're all just people. The more some of these women sit here and try to defend out rights, I personally just think it might make us look a little more inferior. I'm not trying to offend anyone, I'm just not big on activists. Or the Lifetime chanel. But seriously, double standards suck. I hate them. I deal with them constantly, especially with a 19yr old little brother that can do more than I can. He has a streetbike. I want one but I can't get one because I'm a girl and according to my dad, "girls aren't supposed to" have bikes. And, if I get one I'm not allowed to live here at my house. That's bullshit.