I am from Tennessee and have lived among rural as well as urban populations. I've also lived in N. Dakota and Kentucky. However, I had never heard this expression until I began working in metro Atlanta schools. The first time I heard it was from an administrator. Since that time, I hear it almost daily and always from African-Americans from the south. Recently a young African-American student from the N.E. informed her classmate who had used the expression that there was no such usage as "on tomorrow." Certainly this may have "hung around" since the early 17th century when slaves learned English from owners of that era. Still, it would seem that an educated person would have learned verb usage and would demonstrate good English usage especially in a school setting. After 10 years of hearing this term, I still cringe. Growing up I thought a good education should evoke some kind of change in a person. But I meet many masters and PH.D degreed persons who I would never guess had an extensive college education. To bad really, especially as they are educators.