You ain't seen nothing yet!

(someone) ain't seen nothing yet

Someone has only glimpsed or experienced the beginning of something that will become even more exciting, impressive, or important. (The word "ain't" is a colloquial form of "hasn't" or "haven't," which are sometimes used instead.) I could tell your parents are already impressed with the house, but they ain't seen nothing yet! A: "Wow, there is so much going on in this city all at once!" B: "Just wait, darling, you ain't seen nothing yet—it only really comes alive at night!"
See also: nothing, seen, yet
Farlex Dictionary of Idioms.

You ain't seen nothing yet!

Rur. The best, most exciting, or cleverest part is yet to come! (The use of ain't is a fixed part of this idiomatic expression.) Alice: Well, the first act was simply divine. Sue: Stick around. You ain'tseen nothing yet! Mary: This part of the city is really beautiful. Bill: You ain't seen nothing yet!
See also: nothing, seen
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • (someone) ain't seen nothing yet
  • (someone) hasn't seen nothing yet
  • yet
  • you ain't seen nothing yet
  • be larger than life
  • a stonker of a (something)
  • get (one's) hand in (something)
  • get your hand in
  • come in on the ground floor
  • be in on the ground floor
References in periodicals archive
But with three episodes still to go, if you thought episode 3 was dramatic, you ain't seen nothing yet!
And if you think Shane Richie's return as the Tangotanned entertainer has been camp and crazy so far, you ain't seen nothing yet!
KENNY Jackett has praised on-loan Liverpool star, Sheyi Ojo, and warned opponents: You ain't seen nothing yet!
"YOU ain't seen nothing yet!" That's the warning to England's opponents at the Women's World Cup from Everton's Jill Scott as the midfielder prepares to face Japan in the third and final group game at the tournament in Germany.
As they in show business circles - You ain't seen nothing yet! - there's more of Jo Cameron on the way.
But you ain't seen nothing yet! Ruth says: ``Next year is European Year of People with Disabilities, and we are planning to develop a bigger and better festival.''
However, to paraphrase Al Jolson, "You ain't seen nothing yet!" Still in its infancy, television is set to explode in usage and influence in the new millennium as an integral component of a wider telecommunications industry, the largest growth industry in the later part of the 20th century.
RAHEEM STERLING committed his long-term future to Liverpool yesterday, but insisted: You ain't seen nothing yet!
If you think China is booming now, you ain't seen nothing yet!