What is the worst thing that you have ever smelled. It can be a person an animal or a thing. The worst thing I have ever smelled is this guy who smells like cheese and butt and they were in my classroom. I don't know how this guy even had friends, it's just really sad. I don't know what he wasn't doing right but he smelled terrible EVERY DAY! How do you not clean yourself properly to the point that you smell like stinky old cheese. Put your comment below i,am curios. I[spoiler]Hope they never find this.[/spoiler]