"Huddie Ledbetter learned quick how politically-correct bread was buttered, and on which side. He learned to knock off singing about Brownskin Women and Yaller Gals, to hold back on all the Pigmeat Papa stuff. Prissy young Pete Seeger and his permanently PC Weavers would change the words of "Good Night, Irene" to "I'll see you in my dreams..." from the darker, dirtier, more dangerous "I'll get you in my dreams." Nothing like a fool, Leadbelly learned to fake the party line and commenced singing something he called "The Bourgeois Blues." It was a title that cut on every edge, more edges than the Folkways folk have ever understood."

from the following site/blog. (Seems well researched as a btw.)

http://74.125.155.132/search?q=cache:dbQD3jiDfSgJ:bartbull.blogspot.com/2008/09/leadbelly-and-ironhead.html+pigmeat,+leadbelly,+
It's interesting to note that "pigmeat" does not appear in Webster's. They have had the word 'fuck' for years, and many other 'crude' terms. If we ever figure out what pigmeat is or refers to, we should make an effort to ensure it gets into the next edition of Webster's by providing a published source.