What is Reddit?
Reddit is the front page of the internet!
Basically, Reddit is a message board of sorts. It has thousands of "sub reddits" or sub boards, for anything you can think of from world news, cute animal pictures, Bondage Porn, Music, etc. People submit things (links, pictures, text posts), and there's an up/down vote system for submissions as well as comments.
Reddit is the reason I disappeared from DTF for a while a year or so ago (not that anyone noticed
).