What does it mean to have a big scar when your head falls off the bowl?

There is a big scar on the head, which means that even if you die, it is just a piece of cake. The "big scar on the head of the bowl" comes from the gunfire on the plain, which is often called "the big scar on the head of the bowl". As a common saying, it means nothing, even death is just a trivial matter. So the big scar on your head means that even if you die, it's just a piece of cake