shoplifting -
A theft from a shop during trading hours.
Verb
shoplifting -
Present participle of shoplift.
Wikipedia
Shoplifting (also known as five-finger discount, or shrinkage within the retail industry) is theft of goods from a retail establishment. It is one of the most common property crimes dealt with by police and courts. Most shoplifters are amateurs; however, there are people and groups who make their living from shoplifting, and they tend to be more skilled.