y'all line Share definition Flag The geographic point in a border state of the south past which the majority of residents speak in a traditonal southern accent. Jane thinks anything above Tampa is The South, but I'd say Florida's y'all line is around Orlando. y'all line by JuleeCruises January 3, 2009 0 0 Get merch Get the y'all line mug. Buy Now — $32.95 See more merch