With the rise of Twitter, the word "twit" as an adjective is coming to mean "from or related to Twitter" as in "Twit Pictures," pictures sent over Twitter.
This makes it hard for us older dogs to read headlines like "Celebrity Twit Pics" on sources like the Daily Beast without grinning if not actually cracking up. And if you have the time on your hands to look at the underlying content, some of the shots really are twit pics, in both the new and old senses of the word. Not all, though, unfortunately.