What does man vs mean?

"Man vs" is a common shorthand for a literary conflict type called "Man vs. [Something]". It describes a central conflict within a story where a character (the "man") struggles against:

* Man vs. Man: A conflict between two or more characters. Think of a classic hero vs. villain struggle.

* Man vs. Nature: A conflict between a character and the forces of nature, such as a storm, wild animals, or harsh weather.

* Man vs. Society: A conflict between a character and the rules, norms, or expectations of their society.

* Man vs. Self: An internal struggle within a character, often involving their own thoughts, beliefs, or desires.

So, "Man vs" is a starting point, and you need the "something" to complete the phrase and understand what kind of conflict the story is about.