Wikipedia
Fortuosity
"Fortuosity" is the first song in the 1967 motion picture The Happiest Millionaire. It was first performed by Tommy Steele playing the part of "John Lawless" (the butler). The song was written by Robert and Richard Sherman. Richard Sherman stated that the word meant "Faith and Good Fortune". "Fortuosity" is another nonsense word alongside the name of another one of their songs," Supercalifragilisticexpialidocious". Steele also sings the song, " I'll Always Be Irish", in the movie.