Club Penguin memes stem from the beloved massively multiplayer online game that defined a generation before its closure in 2017. The most famous iteration is the 'Club Penguin is kil' copypasta, which originated on 4chan and features intentional misspellings to create a comedic sense of grief over the game's end. Other variations include humorous 'banned' screenshots, puffle-related jokes, and nostalgic tributes to the sign-off phrase 'Waddle On.' These memes serve as a cornerstone of internet nostalgia, capturing the chaotic yet wholesome energy of early 2000s social gaming culture.