It has been a source of great frustration to me that it is so difficult to find a version of this song that hasn't been mangled by a singer who seems unaware of what they are singing about or to be deliberately hiding it. Mack is a multiple murderer and the song's comparing him to a shark and pointing out that he's a lot meaner. They deliver the song like he's some kind of likeable man-about-town.
It has been a source of great frustration to me that it is so difficult to find a version of this song that hasn't been mangled by a singer who seems unaware of what they are singing about or to be deliberately hiding it. Mack is a multiple murderer and the song's comparing him to a shark and pointing out that he's a lot meaner. They deliver the song like he's some kind of likeable man-about-town.