A crop top is a top that exposes the waist, navel, or abdomen.
The early history of the crop top intersects with cultural views towards the midriff, starting with the performance of Little Egypt at the 1893 Chicago World's Fair. Although the crop top first gained prominence in the fashion industry during the 1930s and 1940s — the latter in particular due to fabric rationing in World War II — it was largely confined to swimwear at the time. It was not until the sexual revolution of the late 1960s and early 1970s that it achieved widespread acceptance,worn by celebrities such as Barbara Eden and Jane Birkin. A variant style, the tied-up top or knotted shirt, also appeared in 1940s fashion and spread in popularity during the 1960s.