It's a Javanese slang according to my Javanese friend. I'm not Javanese myself and never heard of this word before. It's rather hard to explain the meaning. It's sort of gently rubbing your hand against someone's head, usually a younger one. My friend said it's a playful action and has no meaning of punishment or such.
I hope my explanation is clear. I need an animation to really describe it..
But feel free to ask more detail if you like!