The Old Reddit Switch-a-roo is a legendary comment-based meme that originated in 2011 when a user intentionally misinterpreted a photo's subject, prompting another user to link to a previous instance of the joke. This created an incredibly long, recursive chain of links known as the 'rabbit hole.' While it doesn't have a static image template, the meme is characterized by the linguistic 'switch' where a secondary object or person in a photo is treated as the primary focus. It represents one of Reddit's most enduring traditions, symbolizing the community's shared humor and love for elaborate, multi-year meta-jokes that lead users through a labyrinth of archived posts.