Thanks for the song, oldhippie. Brand recorded it on one of his "Bawdy Songs" albums in the mid-fifties, after "A Guy is a Guy" was already a big hit.

I'm still wondering if there's any corroborative evidence that a pre-Brandian song like this with the words "a gob is a slob" in it ever really existed.

It could have, but did it ? Or did Brand merely splice the phrase (which he may have heard from some jokester) into "A Knave is a Knave," which he then turned into "A Guy is a Guy" ?

The reason I suspect the latter is simply that the words "gob" and "slob" don't seem to appear in any other trad song.