Shell-Shock is an official English noun, so this music probably may refer to it instead. noun psychological disturbance caused by prolonged exposure to active warfare, especially being under bombardment.
Also, people who were called "Shellshocked" had what today is known as Post Traumatic Stress Disorder. They were called "Shellshocked" because the people of the time thought injuries in warfare caused their inability to be up to par with the average population. Years later, and after lots of research, anyone who fights in war, injured or not, can get it because killing another human, and seeing so many die in front of you, is just too much for human tolerance. I hope you learned something from here.
