l'ombelico del mondo

I would like to know the real meaning of this idiom. Is it a swear word?
There is a song of Jovanotti with this name.

Hi, there! I'm not an italian native, but as I know, this is something like " the centre of the world" - very important person, I think u understand. L'ombelico means belly button. let's hope that an italian guy will let us know if we got mistake. All the best. Oana

right Oana!!!

that means the belly-button or the navel of the world, that is the centre of the world,the origin of life and fun....