The 'Oreo Grammar' meme is a visual pun based on the branding of the world's most famous sandwich cookie. The template deconstructs the name 'Oreo' into parts: 'O' representing the chocolate wafer and 'RE' representing the cream filling. By rearranging or repeating these segments, users create increasingly absurd cookie towers, such as the 'RE-RE-RE' (all cream) or the 'OR-RE-O-RE-O' (a double stack). Originally gaining traction on platforms like Tumblr and Reddit around 2013, the meme has evolved into a popular format for exploring nonsensical logic and visual patterns, making it a staple of internet wordplay and minimalist humor.