“Killing floor” refers specifically to the noted Chicago gruesome slaughterhouse areas where gore reigned (and I dont mean Al) and where septic infections from cuts caused death. Read “The Jungle” by Upton Sinclair. As legendary blues giant Howlin' Wolf intended it, it signifies entrapment in any such hellish environment, i.e. itself, war, misery, evil — it's been expressed in all these ways by the bands that covered Wolf, as this one does, moreso here emphasising the rocking melody. See my 99 iconic photos of Howlin' Wolf at www.howlingwolfphotos.com I was Wolf's great friend and photographer, as well as music student.