What is a "meme"? What were the top memes of 2012?

You might have heard the word meme in your Web search travels. Basically, a meme on the Web is a phenomenon, fad, sensation, rumor, or oddity that gets passed around quickly to large numbers of people; this can be via email, word of mouth, blogs, Web sites, chat, pretty much any kind of Web communication.

Here are the top 20 Web memes that you've probably seen in one form or another somewhere on the Web; some are funny, some are weird, but they're all wildly popular.

More wildly popular trends, sites, or videos

• The Top Twenty YouTube Videos of All Time
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• Twenty Really Weird Websites

Pssst......Don't forget to Nominate your favorite site in the 2013 About Web Search Readers' Choice Awards!