It came back to me today: that "...hey, john Dougal a ren fra rooshity roo..." line is from "The Wee Cooper O' Fife," I believe. While the song is definitely not PC and is, in its way, BS*, it's just the refrain that is nonsense:

"nickety, nackety, noo, noo, noo" etc.

Genie

*The premise is that the lazy rich-girl wife is straigtened out by a good thrashing by the husband [thrashing his "ain sheepskin" which he has thrown across her back].