A means of distribution. It is the reverse of shoplifting
, where something is taken from a store without the store's knowledge. Droplifting involves bringing merchandise into a store without the knowledge or consent of the store. The product is then purchased or possibly stolen by the normal patrons.
Well, in the case of CD distribution, it is a novel way to get an illegal product into the hands of the CD buying public. The folks at http://www.droplift.org/ wanted to distribute their CD "The Droplift Project" which is made up of songs that contain uncleared samples of other songs or sounds.