Fake meme invented by the TV show South Park where one uses their fingertips to pull outward the chest of their shirt to create the look of fake breasts, and takes a picture. It is meant as a commentary on how silly internet memes have become.
Tired of doing the same meme poses such as bunny ears, peace sign, doing the Tebow or planking, for pictures that would inevitably be uploaded online, Jim decided to caught everyone off guard by Faith Hilling and appearing to have an enormous rack.