"TTFN" stands for "Ta-Ta For Now," a casual way to say goodbye. It is often used in informal conversations among friends or family. The phrase conveys a light-hearted tone, suggesting that the speaker intends to return or reconnect later. The expression gained popularity through its use in popular culture, particularly in the character of Tigger from A.A. Milne's Winnie the Pooh stories. Tigger's cheerful personality and playful language made "TTFN" a memorable farewell, contributing to its enduring presence in everyday language.