droplifting
Droplifting is the opposite of shoplifting; it involves leaving a product or item in a shop, rather than taking one. It has been used by artists and musicians to promote their work for free, whilst some people use droplifting to make political or economic statements. (for example by altering shop’s products and then returning them)
Person #1: Why is there a can of Sainsburys soup for sale in Tesco?
Person #2: It must have been droplifted.
Person #3: What’s droplifting?