Its a term to describe the coming shop-ocalypse of the 22nd of December 2012. When the world fails to end on the 21st of December 2012 as the Mayans predicted people will go out Christmas shopping en masse to shop for stuff they should have bought before the 21st. This will lead to the deaths of thousands of individuals trampled to death in the ensuing chaos. This event will become known as the the shop-ocalypse of 2012.
Ted didn't die in the Shop-ocalypse because he got his Christmas shopping done before the Shop-ocalypse.