1.A blood sucking vermin that drains strenght from it's host.
2. Any of various chiefly moronic filesucking, bandwiidth hogging, and carnivorous 'users' of the class assholenea takeallus, of which one species (homo forumis) is generally found to suck in forums too.
3. One that preys on or clings to another; a parasite, fileleech.
4. One on who existance depends on the good deeds of others, but never themselves.
Gene: What's up, man?
Tom: Nothing much. I have a Juhas on my back.
Gene: My cousin had one of those once. It took forever for it to die.
Tom: Aw fuck.