In a movie I was translated recently I bumped into a really puzzling spot.
Here's the dialog between grandmother and her grand son.
A boy: "You don't miss a trick, do you, Gram??"
(Grandmother points to her forehead with her index finger): "Twenty-twenty."
I can't figure out what did she mean by this "Twenty-twenty"! Somehow related to eyesight?
Will try to upload an extract from the movie soon.