From Art and Popular Culture:
"Prisencolinensinainciusol" is a song composed by Adriano Celentano, and performed by Celentano and Raffaella CarrĂ . It was first released as a single on November 3, 1972, later also on his album Nostalrock. The lyrics are pure gibberish, in an interview Celentano explains that the song is about "incommunicability" because in modern times people are not able to communicate to each other anymore adding that "prisencolinensinainciusol" is supposed to stand for "universal love".