Salon explicates the LOLcat:
In one classic example, one cat is crying, and another is hugging it and saying, "Don't crai. We'll get cheezburger someday." It's sweet and poignant and wistful all at the same time. Life can be hard, it says, and we don't always get what we want, but even as we long for things we may never have, we draw succor from the reassurances of those we love. Sure, it's ridiculous that what the cat is yearning for is a cheeseburger. But the cheeseburger is not really a cheeseburger -- it's a symbol.
[Via]