After looking around, I was beginning to think Alice made up this title.

I did find another thread, though at Lyr Req: Knickers of Corduroy so apparently it's real. Lyrics are given in this thread.

I note an archaic spelling "corderoy," (Random House unabridged) and found a couple of albums that spelled it "cordouroy" - reason unknown, but have not come up with anything useful searching variants.

It is listed in a "playlist" as performed by a group called "Four Shillings Short." One other site implies that Maighread ni Dhomhnaill either created or performed it - that site's pretty messed up.

John