What about this
![Big Smile [:D]](/emoticons/emotion-2.gif)
:
Taumatawhakatangihangakoauauotamateaturipukakapikimaungahoronukupokaiwe-nuakit
It is part of the name of a hill in New Zealand since the other part is with a space so I don't think it really counts:
Taumatawhakatangihangakoauauotamateaturipukakapikimaungahoronukupokaiwe-nuakit natahu, a New Zealand hill.