Grumpy Cat (born April 4, 2012), real name Tardar Sauce is a female cat and Internet celebrity known for her grumpy facial expression. Her owner Tabatha Bundesen says that her permanently grumpy face is due to feline dwarfism. Grumpy Cat's popularity originated from a picture posted to the social news website reddit by Tabatha's brother Bryan on September 22, 2012. (Wikipedia) #GrumpyCat
Earl the Grumpy Puppy is the Internet's favorite new grouchy animal | Mashable | image source: | Earl's owner, Derek Bloomfield, told ABC that despite his dog's grumpy mug, he is "super friendly" to people and other dogs.