Description: a multiplayer game about being a cat. Instructions: be a cat. This isn't a LunchTimeWaster as much as it's a LifeTimeWaster. This is ChatChat.
Created by Terry Cavanagh (the same developer behind VVVVVV), ChatChat is free to play over at Kongregate. The game seems to serve no purpose beyond being adorable, and I must admit that I found myself enjoying the interaction with other people in cat-form. It's a bizarre experience -- a simple, quest-less, non-violent MMO where everyone is a cat. Huh.
Now if you'll excuse me, I have a mouse to chase.