Emetophobia. (Vomiting) It's I think the fifth most common phobia, and it's really not fun to live with. It's changed my whole life since I was a kid. Sometimes people that are just scared of something call it a phobia, when in reality phobias are intense, irrational fears that cause people to run screaming from whatever they've got a phobia of. Phobias suck, because in reality we know our fear is stupid, but our subconscious mind screws us over regardless.