Shoplifting (also known in slang as boosting and ) is a popular term used for the unnoticed theft of goods from an open retail establishment. Shoplifting typically involves a person concealing a store item on their person, in pockets or under clothes (or in a bag, baby stroller, etc.) and leaving the store without paying for it. With clothing, shoplifters may put on items from the store and leave the store wearing the clothes. The terms "shoplifting" and "shoplifter" are not usually defined in law. The crime of shoplifting generally falls under the legal classification of larceny. Shoplifting is distinct from burglary (theft by breaking into a closed store), robbery (stealing by threatening or engaging in violent behavior) or armed robbery (stealing by using a weapon). In the retail industry, the word shrinkage or shrink can be used to refer to merchandise lost by shoplifting, but the word also includes loss by other means, such as waste and theft by store employees.
Shoplifters range from amateurs acting on impulse to career criminals who habitually engage in shoplifting as a form of income. Career criminals may use several individuals to shoplift, with some participants distracting store employees while another participant steals items. Amateurs typically steal products for personal use, while career criminals generally steal items to resell them in the underground economy. Other forms of shoplifting include swapping price labels of different items, return fraud or eating a grocery store's food without paying for it. Commonly shoplifted items are those with a high price in proportion to their size, such as disposable razor blades, vitamins, alcoholic beverages and cigarettes. Retailers have reported that 0.6% of their inventory is lost to shoplifting.
Stores use a number of strategies to reduce shoplifting, including storing small, expensive items in locked glass cases; chaining or otherwise attaching items to shelves or clothes racks (particularly expensive items); attaching magnetic or radio sensors or dyepacks to items; installing curved mirrors mounted above shelves or video cameras and video monitors, hiring plainclothes "store detectives" and security guards, and banning the bringing in of backpacks or other bags. Some stores have security guards at the exit, who search backpacks and bags and check receipts. Stores also combat shoplifting by training employees how to detect potential shoplifters.