Sniglets are words that should be in the dictionary but aren't. If that sounds interesting, and you enjoy wordplay and word games then you'll love Verbotomy. Each day you're presented with a definition and must come up with an original word to match. If you verbin and become a verbotomist, you can save your words and build up points towards each round of play. You can also vote on your favorite entries and subscribe to an RSS feed so you can know immediately when a new verboticism is ready and waiting.
This is obviously a very casual game, requiring only a few minutes of your time each day. More fun for me than creating a new word was viewing and voting on other words. For instance I came up with a word I was rather proud of, "blamefuscate," for a definition last week, but was even more impressed with some of the other words. "Culpitize" and "whomeopathy" were great, and I still laugh when I read "stinkerise" purely for its scatalogical value. Some other favorites of mine are "flatterchatter", "memorafeeblia", and of course the utterly nonsensical "potatobomb".
This is a game with a lot of those "Now why didn't I think of that?" moments. In fact, that's a great definition in need of a word. What would you call that feeling that you should of thought of, say, the simply brilliant "namenesia" instead of your own stunningly dull "resnub"?
If you like word games and subtle word humor, then go forth and verbotomize!