What is a Meme? Of course you heard about it, in some news site, blog, or a friend talked about it, but are you really know what is a meme? On Micro Persuasion there is a post talking about meme with an answer from The New York Times:
Memes (the word rhymes with dreams and is short for mimemes, from the word mimetic) are infectious ideas or any other things that spread by imitation from person to person – a jingle, a joke, a fashion, the smiley face or the concept of hell.
Try the great Wikipedia topic about meme.