I didn't think you did
It is chess ranking. If you play in competitions, you get an Elo - a number indicating your chess strength. The name comes from the inventor, a Dr. Arpad Elo. The coincidence when you said Elo three times became too much for me not to comment on it.
And no - I will not apply for mod.
Is that a world ranking?
Mark Lenders banged your girlfriend, I'm sorry to tell you that mate.