Sudden, otherwise unprovoked, fits of fainting in adolescent girls. Related to the menstrual cycle, the vapors tend to be at their most troublesome if you "aren't one of those girls": that is, intellectual, independent, and feminist. Unfortunately, this affects vegetarians more than carnivores, and girls "on a diet" or just eating less than otherwise. Otherwise known as "throwing a wobbler", the only known treatment is rest and love. (Although pelvic massage might help, as well.)