What is backrooms meme?

The Backrooms meme is a horror-themed internet meme that originated on the imageboard website 4chan. The meme is based on the concept of a fictional level or place that anyone can enter accidentally, called the "backrooms", and the unsettling and eerie experiences that supposedly occur within them. The backrooms are described as a seemingly endless and mundane network of yellow, poorly lit rooms with worn-out carpeting and fluorescent lighting. The meme often features distorted images of the backrooms and stories of creepy encounters with strange entities or phenomena within them. The backrooms meme has since spread across the internet, inspiring numerous fan artworks, videos, and even a video game.