Grumpy Cat, whose real name was Tardar Sauce, became an internet sensation in 2012 due to her permanently cranky facial expression caused by feline dwarfism. While she was famous for being unimpressed, the Grumpy Cat Happy variant often features rare angles or edited images where she appears to be smiling. These images are typically used ironically to represent a fleeting moment of joy in a sea of cynicism or a dark sense of satisfaction. Even years after her passing, her expressive face remains the gold standard for internet sarcasm and relatable mood swings.