What does the phrase "student body left" mean and where did this originate?

Never heard the phrase even in my life, what nation is this from , what culture?

Can you provide context?

Can you provide context?

If you Google the phrase, you will find all sorts of articles and references to the phrase but I could not find a definition. The phrase is used in the United States.

Again CONTEXT. The phrase student body left/right is mostly associated with a college football play where the entire lines moves either left or right. But it has also been used in other contexts.