The phrase "TTFN" stand for "Ta Ta For Now," (or good bye) and is currently heard being used by Tigger in some animations of Winne the Pooh. However the term TTFN appeared much earlier in a World War II BBC radio show called "It's That Man Again", otherwise known as ITMA. The program ran for ten years from 1939 to 1949 and Tommy Handley who was the host of this weekly comedy show used the closing line to the listening audience "TTFN". A very popular phase at the time in british culture, although not so popular now.
Lanzo
PS I would love to say that I was a true british historian, but I had a few minutes spare and just googled it.
