Noble100 10-10-2019Hi Tim,
... I discovered he was actually singing "Bird, bird, bird, bird is the word".
Thanks for your comment about "Surfin’ Bird," and for the link. The lyric is actually "bird is a word," at least in most places in the song, which I think is even funnier than if it were "the word."
Perhaps that lyric was inspired by a dance known as "The Chicken," which originated in the 1950s, and which the performer appears like he might be doing in the latter part of the video you and Geoff linked to. (The video, btw, is incorrectly titled "Surfin Bird - Bird is the Word"; just Google "Surfin’ Bird lyrics" for additional confirmation of that).
Best regards,
-- Al