I don't know that it specifically refers to moonshine, but I occasionally did a song during my army service in the northwest years ago called "Nancy Whiskey." My decision to use that song in a particular set once caused some grief for me when a certain young lady folksinger (who happened to be named Nancy) let me know, in no uncertain terms, that she hated the song. I was quite smitten with her at the time and immediately struck it from my playlist - at least, whenever she was in the audience.