A crop top (also cropped top, belly shirt, half shirt, midriff shirt, tummy top, short shirt, and cutoff shirt) is a T-shirt or blouse with the lower part cut off, showing off some of the abdomen. The half shirt (or belly shirt) is a kind of shirt that is cut off from the bottom of the chest.

During the mid-1980s, pop star Madonna caused a controversy when she gyrated in a mesh crop top in her video for the song "Lucky Star." Also during this decade, cutoff crop tops became a popular fashion item thanks to the aerobic craze and popularity of the movie Flashdance. It became common for girls to crop off sections of their workout wear, such as sleeves, collars, and the hem of the shirt to create a loose-fitting top which was often worn over a body suit or tank top. Crop tops were also often paired with low-slung belts in the 1980s, angled at the side of the hip.As mesh fabrics and oversized aerobics gear went out of fashion by the 1990s, the crop top reappeared in the form of the bustier, a lingerie-styled shirt which revealed the midriff and was typically worn under a blazer or shirt. By the mid-1990s, the crop top took on the form of the baby doll shirt, a cropped, tight-fitting t-shirt which often featured graphic logos. Long-sleeved crop tops and even crop top turtlenecks also became fashionable for the first time, popularized by such public figures as country singer Shania Twain. By the late 1990s, crop tops had become so mainstream that many schools began banning the garment in their dress code.

A crop is a non-animal species or variety that is grown to be harvested as food, livestock fodder, fuel or for any other economic purpose. Major world crops include sugarcane, pumpkin, maize (corn), wheat, rice, cassava, soybeans, hay, potatoes and cotton. While the term "crop" most commonly refers to plants, it can also include species from other biological kingdoms. For example, mushrooms like shiitake, which are in the fungi kingdom, can be referred to as crops. In addition, certain species of algae are also cultivated, although it is also harvested from the wild. In contrast, animal species that are raised by humans are called livestock, except those that are kept as pets. Microbial species, such as bacteria or viruses, are referred to as cultures. Microbes are not typically grown for food, but are rather used to alter food. For example, bacteria are used to ferment milk to produce yogurt.

A top (also called spinning top or spintop) is a toy that can be spun on an axis, balancing on a point. This motion is produced in the most simple forms of top by twirling the stem using the fingers. More sophisticated tops are spun by holding the axis firmly while pulling a string or twisting a stick or pushing an auger as shown in the pictures on this page. In the kinds with an auger, an internal weight rotates, producing an overall circular motion.

The top is one of the oldest recognizable toys found on archaeological sites. Spinning tops originated independently in cultures all over the world. Besides toys, tops have also historically been used for gambling and prophecy. Some role-playing gamers still use tops to augment dice in generating randomized results; it is in this case referred to as a spinner.^{[citation needed]} A thumbtack may also be made to spin on the same principles.

The action of a top relies on the gyroscopic effect for its operation. Typically the top will at first wobble until the shape of the tip and its interaction with the surface force it upright. After spinning upright for an extended period, the angular momentum, and therefore the gyroscopic effect will gradually lessen, leading to ever increasing precession, finally causing the top to topple in a frequently violent last thrash.