That's why I didn't really think of that one, as chornamaz sounds more offensive, being "smeared in black" which sounds like the very nature of being black is a stain. As a whole insults in Russian don't have as much of a sting, because everything can be used as one, though I think "zehdove" is probably the funniest as it's just calling someone a "greedler" and it's vaguely acceptable to say.