With the launch of 140pedia, Twitter has officially taken over the world--well, at least its concise crowdsourced encyclopedias. 140pedia lets you define a term, word or meme using 140 characters or fewer.
For credit, each 140pedia submission must include the writer’s Twitter account. There’s a giant button to instantly tweet any given entry. The encyclopedia comes from the Internet-obsessed minds behind the ‘I Can Has Cheezburger’ enterprise, so there are links to LOLCats and Failpix aplenty.