Reddit is an American social news aggregation, web content rating, and discussion website. Registered members submit content to the site such as links, text posts, and images, which are then voted up or... wikipedia.org
Definition #2 for "reddit"
Reddit is a social news aggregation website that ranks content based on a scoring system determined by user votes. Its users are often referred to as ?Redditors?, and belong to what has been called ??one of the most influential communities on the Internet?? in an article on Voltier. The site has played a significant role in the spread and creation of Internet memes.