You don't need angular momentum to define spin. Spin is a concept that naturally arises just from the geometry of our space. You can define spin of a human body

You don't need angular momentum to define spin. Spin is a concept that naturally arises just from the geometry of our space. You can define spin of a human body. I wrote a blog post about this https://dandanua.github.io/posts/the-spin-of-a-human-body/ https://dandanua.github.io/posts/the-spin-of-a-human-body/