Also, thinking more about it, is it possible instead of "porter" in the yard, he says "porker," as in a pig? Looking elsewhere, that's what Andrew Kuntz (Ragged but Right, 1987) wrote. Users on WeenieCampbell, however, who are generally pretty trustworthy with this sort of thing, felt it was porter and not porker. But I guess this belies the question, what is a porter in the context of this song?