ScanIAm wrote:
After all, WTF does goo-goo-ga-choo mean?
The song also contains the unusual exclamation goo goo g'joob. Various unsatisfactory hypotheses exist regarding the origin and meaning of these syllables. One popular, yet impossible, claim is that the phrase was derived from the very similar "koo koo ka choo" in Paul Simon's song Mrs. Robinson, written in 1967. However, the film The Graduate, where "Mrs. Robinson" debuted, was not released until December 1967, a month after the release of "I Am the Walrus", and The Graduate Original Soundtrack (which contained only fragments of the final version of "Mrs. Robinson") was not released until January 1968.
Perhaps due to the close chronological timing of the release of the two songs, the "Walrus" chorus is often misquoted as "Mrs. Robinson"'s "koo koo ka choo", although the lyrics to "Walrus" were published as part of the Magical Mystery Tour EP packaging, so there is no debate to the actual lyric.
It has also been noted that James Joyce's Finnegans Wake contains the words googoo goosth at the top of page *557, where it appears:
...like milk-juggles as if it was the wrake of the hapspurus or old Kong Gander O'Toole of the Mountains or his
googoo goosth she seein, sliving off over the sawdust lobby out of the backroom, wan ter, that was everywans in turruns, in his honeymoon trim, holding up his fingerhals...