To go into a store or shop and discreetly steal items which are for sale without getting caught. These items can range anywhere in size from a basketball to a dixie cup. Useless items you don't really need are sometimes taken because many people do it for the rush as opposed to needing the stolen object.
The opposite of Droplifting.
Did you see Lisa? She just took those earrings out of the package and put them in her sleeve!
Wow it's real cool to shoplift. I wish I had those crappy earrings.