Who are the biggest legends to ever live

[Ghost]

Define "legend"

Mine might clash with the norm.

An explanatory table or list of the symbols appearing on a map or chart

Cute

Suppose you can also define "ya'll"

If I knew what ya meant then maybe Im guessing you mean Y'all yea

Pert near but not quite.

Y'all means "you all" as in those in a room or at a concert.

ya'll means everyone everywhere who falls into a defined category.