For almost 50 years, the Beatles have been the most popular singers and songwriters in the world. Also, coincidentally, for the past half century one of the major activities of musical "armchair quarterbacks" has been to dissect, analyze, and interpret Beatles songs.

In 1967, a student from Quarry Bank High School (Lennon's alma mater) sent John Lennon a letter telling him his teacher was conducting a class analyzing the Beatles' songs. Lennon was wryly amused. This letter served as the initial motivation for John to write a song that was beyond analysis for the simple reason that John didn't want it to make any sense at all. The whole purpose of the song, according to John, was to confuse, befuddle, and mess with the Beatles experts.

Who is the Walrus?

"Walrus is just saying a dream," recalled John more than a decade after he composed it.

"The words didn't mean a lot. People draw so many conclusions, and it's ridiculous. I've had tongue in cheek all along--all of them had tongue in cheek. Just because other people see depths of whatever in it...What does it really mean, 'I am the Eggman?' It could have been 'The pudding Basin' for all I care. It's not that serious."

John also wanted to make a point about fellow musical icon Bob Dylan, who, according to John, had been "getting away with murder." John said he wanted to show his fans that he "could write that crap too."

"I Am The Walrus," the song with no rhyme or reason, was written in three parts: part one was written by John during an acid trip, part two was written during another acid trip the next week, and part three was "filled in after [he] met Yoko."

Meaningless gibberish or not, many of the song's lyrics did have an inspiration.

The song's opening verse, "I am he as you are he as you are me and we are all together," comes from the song "Marching to Pretoria," which contains the lyric, "I'm with you as you're with me and we are all together."

"See how they run, like pigs from a gun, see how they fly..." came the next week directly from John's second acid trip.

The song's basic rhythm was actually inspired by a police siren. John heard an oscillating siren blaring in his neighborhood, and this beat served as the basic beat for the entire tune.

"Sitting in a English garden" refers to John's garden in his Weybridge home, where he was living, frustrated and increasingly unhappy, with his first wife, Cynthia.

The lyric "Waiting for the man to come" was written by John, but was amended with "waiting for the van to come" by John's friend from his high school days, Pete Shotton, who was present during the song's composition.

The "elementary penguin" was used by John as a jab at those who "go around chanting Hare Krishna or put all their faith in one idol." John admitted he had poet Allen Ginsburg in mind when he wrote the lyric. (Could he also have wanted to get a sly dig in at his bandmate George Harrison, who was enthralled by all things Indian and Hare Krishna?)

Needing a bit for the song's middle section, John asked his old pal Pete to recall a "sick" schoolboy poem the two used to recite together. Pete dredged up the old lyrics:

"Yellow matter custard, green slop pie,

Dripping from a dead dog's eye,

Slap it on a butty, ten foot thick,

Then wash it all down with a cup of cold sick."

The constantly repeated and apparently nonsense lyrics "Goo goo gajoob" come from James Joyce's "Finnegan's Wake." (The actual term Joyce used was "Goo goo goosth.")

Lewis Carroll's Through the Looking Glass (one of John's favorite books when he was a youth) gave Lennon the song's title and recurring lyric, "I am the walrus." In that book, Carroll included the poem "The Walrus and the Carpenter." John, always the most political Beatle, had it "dawn on" him that the poem was Carroll's comment on "the capitalist and worker system."

It wasn't until later that John realized that the walrus was "the bad guy" in the poem and that he should have called the song "I am the Carpenter."

"But that wouldn't have been the same, would it?" admitted John.

Another apparent nonsense lyric was "Semolina Pilchard." Many Beatles "experts" have interpreted this as referring to Detective Sergeant Norman Pilcher, who was becoming famous for his drug busts of famous musicians (after he had planted the drugs himself). John himself, along with his then-girlfriend Yoko, was to be arrested in a bust by Sergeant Pilcher a year later. John always insisted the marijuana found at his flat was planted. (Sergeant Pilcher later served six years in prison for his corrupt behavior.) But this "interpretation" may be entirely conjecture, as John can clearly be heard singing "Semolina Pilchard," not Pilcher. A "pilchard" is defined as one of "various small marine fishes relating to a herring." It is a commercially edible species of fish. The line may just simply be another bit of Lennon-esque gibberish and wordplay.

Who is the Egg Man?

"I am the egg man" has been interpreted as referring to Humpty Dumpty (who appears in John's beloved "Alice in Wonderland" books). Eric Burden, a popular singer/musician and a close friend of John, has claimed that he was "the egg man," and that the lyric refers to a certain sexual act Eric used to perform with women. (Eric says he would crack eggs over naked women's bodies and that John witnessed him doing it one night.)

The song's closing features a snippet from a BBC Radio broadcast of Shakespeare's King Lear, which John happened to hear when he was working on the song.

At the song's conclusion, the entire chorus (8 males and 8 females) join in. John said the guys sang "Oompah oompah, stick it in your jumper," while the girls sang "Everybody's got one." But according to Beatles expert Mark Lewisohn (a highly reliable source), the chorus was entirely random with both men and women joining in on each of the two lyrics.

"I Am The Walrus" was the first song the Beatles recorded after the death of their manager, Brian Epstein. (Brian died of a drug overdose on August 27, 1967, and the recording of "I Am The Walrus" came mostly in early September of '67.)

Engineer Geoff Emerick was never to forget "the look of emptiness on their faces when they were playing."

"I Am The Walrus" was released on November 24, 1967. It was the B-side of the Beatles single featuring Paul's "Hello Goodbye" as the A-side. John was always angered by this decision, maintaining that "Walrus" was a far superior song.

A filmed sequence of "I Am The Walrus" was to be featured in the Beatles TV movie, Magical Mystery Tour, later that year. It remains the only film of John singing the song. For this reason, Paul has said Magical Mystery Tour has "a special place in [his] heart."

"I Am The Walrus" was banned by the BBC because of the nonsense lyric "Girl, you let your knickers down."

To be fair, "Walrus" is definitely a strange song, but it may not actually be "the strangest Beatles song." That honor perhaps should go to their 1967 song "You Know My Name (Look Up the Number)" or, better yet, John's 1968 "Revolution #9."

But heck, who would have wanted to read an article about "the Beatles' second (or third) strangest song"?