I'm really taken with one of the variations of "lol" that I recently ran into: "rofloctopus." It's the next step after "roflcopter," which is cute but doesn't really make sense. A helicopter can't roll on the floor very well, let alone laugh. An octopus, however...

Well, think about it. Really try to picture it. The tentacles. The rolling. The writhing. The laughter. It's a wonderful image.