Someone who floats around online with no purpose in life annoying people. Similar to a common fart. They are not a good person, neither a bad person, just annoying.
A cyber fart typically spams social networks like Reddit submitting hundreds of links everyday.
That cyberfart has floating around reddit today, I think I will just ignore him and hope he goes away.
A woman who gathers an ongoing series of male harems around her, usually White Knight Beta Orbiter Cucks, and gets them to do her bidding by insinuating that she will have sex with them eventually, but rarely goes beyond cybersex and sexting. May lure these men by projecting an avatar image that does not match reality. The Cybertart will whip her harem into a frenzy by starting fights she cannot finish, and they will compete with each other to do more for her than the rest to increase their chance of getting in there. But the promised goods are never delivered, and once the harem learns this, she will move on to a new harem and start the process all over again.