Meaning of you ain't seen nothing yet | Babel Free

Definitions

1. There's more where that came from; what you have seen so far is only the beginning. Used to inform the listener that they should expect further surprises, and that the speaker has only just begun doing something.
   colloquial
2. You haven't seen everything yet
   colloquial

Examples

“Sam Montgomery (Hilary Duff): Rhonda, you sure do have a knack for taking something simple and making it beautiful. / Rhonda (Regina King): Well, you ain't seen nothin' yet.”

“"Ain't it a great show?" said the man. " / "'Tain't so great as 'twas last year in the Garden," she answered. / "Yes, 'tis, too, greater," he contended; "it’s a heap higher. We’ve just come in on the main floor. Why, you ain’t seen nothing yet. This show is in stories—begins on the ground floor, where we are now, and rises up like the Washington monument."”

CEFR level