A member of a gang. Plain and simple. You can call them "family" if you want. But it's still a gang. They have a clear leader (ICP). They claim a phisical territory (usually a mall or nearby park). And I've yet to meet a juggalo who doesn't commit crimes on a regular basis. If you don't thats great, sorry so many others ruin it for you.
A juggalo is just another crypt or blood as far as I'm concerned. Just instead of fighting over favorite color, most will attack you (but they only attack in groups anywa) if you don't like ICP.
I personally have been jumped and threatened with murder and rape by juggalos before, all because I wandered into the wrong park to be with my girl. There's your fucking family for you.
I'll never say i hate juggalos because I don't believe in hate. But if you have ever hit someone or bitched someone out for not liking ICP you are a juggafag. I now some cool juggalos they know my veiws and we're square, they don't talk about ICP around me I don't talk shit about ICP around them.