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?
Verb. A childish and unhappy reaction to a certain situation that does not go the way in which the subject wanted. The phrase originates from the face a baby pulls when they're upset.
Nic was dropping lip because his girlfriend denied him a blowjob before bed.
or
"Brad, don't drop lip because your dick's too small, just be glad that girls have a back door."