What is a meme? According to http://netforbeginners.about.com/od/weirdwebculture/f/What-Is-an-Internet-Meme.htm
…a meme is a virally-transmitted cultural symbol or social idea.
Using a meme can help spread a message or idea instantaneously. This method of communication is critical to the world of digital media. Memes are often funny and have a tendency to be remembered in the future. Each meme has a certain set of rules to follow. But like all rules, sometimes they need to be broken.
One of my favorotes is the Joseph Ducreux meme.
This has become popular for using well-known song lyrics or quotes in a style of verbose old English. The background is a self-portrait of Baron Ducreux himself. (If you have any trouble with the lyrics on this one, click here.)