This term was used in Tamil Cinema for the first time in the movie 'Boss Engira Baskaran' by tamil comedian Santhanam.
Since then, it has shot up in popularity and usage in several tamil conversations and also lot of tam-eng mixed dialogues.
It is a term used to (more often sarcastically) refer to a person as a big shot. More often, this is used in a response statement to someone bragging about himself.
The utter lack of interest that ensues shortly after downloading numerous, mind-numbingly worthless apps for an iPhone or similar "smart phone" device. Appathy may also apply, in a broader sense, to the same feelings that arise from the proliferation of numerous "app" stores as greedy corporations try to profit jumping on the app store bandwagon.
His appathy started shortly after downloading that light-saber for his iPhone or was it that completely inane app to calculate tips for restaurant bills.