The 'Oh Shit, a Rat' meme originated from a 2018 viral video featuring a man dancing excitedly after spotting a rat in his kitchen. The video's chaotic energy, combined with his distinctive voice and enthusiastic jumping, quickly turned it into a staple of internet humor. It gained massive traction on Vine, Twitter, and later TikTok, often used to express sudden excitement, frantic energy, or over-the-top reactions to minor inconveniences. The meme has since evolved into a versatile reaction format for anything that triggers a chaotic or hysterical response, becoming an iconic piece of digital culture.