Here's the description on the home page
Just what is Broken Picture Telephone, you ask? Why is it the game of miscommunication?You sign up and voila! Have cracked up many times reading through some of the games.
Broken Picture Telephone is a game similar to the childhood game of Broken Telephone - the game in which children sit in a circle, and whisper a sentence or phrase in a circle.
If you've ever played the game, you know that very quickly hilarity ensues. Broken Picture Telephone is the web-incarnation of that old children's game, with a slight variation in how it's played. Rather than whispering words to strangers around the internet, the game alternates between words and drawings.
And yes... hilarity does ensue.
Here's an example of one I participated in
Edit: hope this isn't old