That is Grumpy-—not the cat in the post. Grumpy is the newest Internet sensation who is probably the most photographed and famous cat in catdom right now!
Grumpy Cat’s real name is Tardar Sauce - so named because the owner’s daughter thought her speckled coat looked like tartar sauce (which was misspelled on the registration form). Her hoomins affectionately refer to her as “Tard.”