A report in the New York Times of a publicity stunt by an unknown woman in 1922, in which she paraded along 5th Avenue clad in yellow silk pajamas and accompanied by four cats similarly dressed, may indicate the phrase was already current by that date, as the "cat's meow" certainly was.
Good to know and I certainly took the phrase literally ..so here's my take on Cat's Pyjamas.
The phrase brought back fond memories of a certain little Tom Kitten, who had overgrown his best suit while forced to get ready for proper company by his mother. Just look at his expression! BP has certainly nailed his look to a tee. Goes to show how far love and passion goes when one adds it into one's work. Priceless!
And thought this was a sweet soundtrack and music video to share.