The song with the longest title is "I'm a Cranky Old Yank in a Clanky Old Tank on the Streets of Yokohama with my Honolulu Mama Doin’ Those Beat-o, Beat-o Flat-On-My-Seat-o, Hirohito Blues" written by Hoagy Carmichael in 1945. He later claimed the song title ended with "Yank" and the rest was a joke.

Longest Song Title

You gotta love those songs whose titles are too long to put on the label of an old 45rpm record. Okay, you don't have to love the song, but the titles are a howl.

The Guiness World Book of Records, acknowledged the world champion song title holder, to be "I'm a Cranky Old Yank, in a Clanky Old Tank, on the Streets of Yokahama with My Honolulu Mama, Doing Those Beat-o, Beat-o, Flat on My Seat-o, Hirohito Blues." According to lyricist Hoagy Carmichael, the original title was only "I'm a Cranky Old Yank", but the joke got out of hand after that.

The longest song title consisting of a single word, recognized as valid in the English language, is "Supercalifragilisticexpialidocious", from the 1960s movie, "Mary Poppins".

The word is listed in the Oxford English Dictionary as an unpublished song (1949) by Parker & Young, albeit with different spelling. Then as a published song in 1951 by Parker & Young.

But wait! OED also lists under our spelling, a song title by R.M. and R.B. Sherman, in 1964. This of course, gave rise to the great, one might even say "super..", well, just super Supreme Court debate over copyright infringement in 1967. Walt Disney studios won, "in view of earlier oral uses of the word sworn to in affidavits", and also because they wrote the entire movie lyrics and music, themselves.