Um what's a world?

Hi, I'm a germ I live in Bob's arm. Recently, someone said the word "world". I've never heard this word. I asked what it means. They said it was what Bob lives in. Someone in the ear heard it and told everybody. I hope to make this "world" sick and unhealthy. Now how do I get out out of Bob?... I finnaly got to the noes. I'm about to jump. Wait no no no. He used that nasal medicine stuff. Good bye world...