A freak show is an exhibition of rarities, "freaks of nature" — such as unusually tall or short humans, and people with both male and female secondary sexual characteristics or 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 fire-eating and sword-swallowing acts.
Freak shows were popular in the United States from around 1840 to the 1970s, and were often, but not always, associated with circuses and carnivals. Some shows also exhibited deformed animals (such as two-headed cows, one-eyed pigs, and four-horned goats) and famous hoaxes, or simply "science gone wrong" exhibits (such as deformed babies).
Changes in popular culture and entertainment led to the decline of the freak show as a form of entertainment. As previously mysterious anomalies were scientifically explained as genetic mutations or diseases, freaks became the objects of sympathy rather than fear or disdain.