When Sarah and I were in NYC, we stopped by the Virgin Megastore, in Times Square. As we were about to leave, we noticed this book with a goofy-looking cat on the cover, and its title was "I Can Has Cheezburger?" It caught the attention of both of us, but we were trying to keep moving, so we didn't stop to look. Later, we kept bringing it up and laughing about it.
We found the website. It's this wacky Lolcats thing, where they have cat pictures and videos with funny captions. Weird, trust me, we get it. But, some funny stuff. Here's an example.