The OMG Cat, also known as the 'Shocked Cat,' became an internet sensation in 2010 after a video surfaced of a white cat named Chocolate looking at the camera with its mouth wide open in a perfect circle. The cat’s expression is one of absolute astonishment, making it one of the most recognizable reaction memes in history. Originally popularized on YouTube and later spreading to sites like Reddit and 9GAG, the meme is used to convey extreme surprise, horror, or the 'mind-blown' feeling. Whether it's a plot twist in a movie or a sudden realization about everyday life, the OMG Cat remains a staple of internet culture for its pure, unfiltered comedic timing.