The Big Blue was a historical event in which someone really went far even as decided to use even go want to do look more like. That's all can be said to describe what really happened on that historic day.
On that fateful day, a user by the name of "Disturbed B" revealed to the world their ungodly abomination: a Dakimakura with a pony on top it. But not just any pony; this was the pony "OC" by none-other than forum mod Blue Screen of Death. Someone took the time, effort, and money into creating something so disgusting that even God did a double-take on it for the sake of an internet joke. (Whether it was for the reaction or the meme points is unsure)