Chocolate Bird refers to a scene in the 2011 movie Jack And Jill (Movie) where a CGI Cockatoo walks into and drinks from a Chocolate Fountain. Gained notoriety when screenshots and GIFs of the scene were posted on Tumblr without context, leading many to believe it was depicting a real bird.
Associated with the phrase "Listen here, cumslut", which one Tumblr user said towards another in a popular reblog chain.