So during one of the first dissections, we were asking one of the professors where a certain structure was. He quickly pointed to what we were looking for and said, "See, there it is! Whomp, there it is, whomp whomp, like the Run-DMC song!" So since everything in our body was so easy to find (and because with every muscle we identified we could say "whomp there it is"),we decided to call our cadaver Run-DMC. But after some careful, peer-reviewed internet research, we discovered it is not Run-DMC but Tag Team who sings that song - oops, now it's public - I have no music knowledge. So, moral of the story, we call our cadaver Tag.
This name also works because half of our Anatomy exams are "practical" - where the professors tag a structure on the cadaver, and you have to identify that structure. Because our cadaver lends itself to clear dissections, he's always one of the bodies chosen to be tagged on the exams.