A freak show is an exhibition of biological rarities, referred to as "freaks of nature". Typical features would be physically unusual humans, such as those uncommonly large or small, those with both male and female secondary sexual characteristics, people with other extraordinary diseases and conditions, and performances that are expected to be shocking to the viewers. Heavily tattooed or pierced people have sometimes been seen in freak shows, as have attention-getting physical performers such as fire-eating and sword-swallowing acts.
From 1840 until 1940, freak shows by the hundreds crisscrossed the United States, from the smallest towns to the largest cities, exhibiting their casts of dwarfs, giants, Siamese twins, bearded ladies, savages, snake charmers, fire eaters, and other oddities. By today's standards such displays would be considered cruel and exploitative—the pornography of disability. Yet for one hundred years the freak show was widely accepted as one of America's most popular forms of entertainment.