It was a very controversial emoji, especially when you couldn't see who did it. It got removed shortly after a poster called out whoever had been using the emoji on his posts and referred to them as "chicken s%*#". Good times.
edit: i found it @wegner. This made me die of laughter when i saw it the first time. The emoji that shall remain nameless...
Give me some skin for finding this post @Tnetennba bro