new ball game: Meaning and Definition of

new' ball' game"

Pronunciation: [key]
— n. Informal.
  1. a new or changed situation: The microcomputer created a new ball game in the field of data analysis. Once we're out of debt it'll be a whole new ball game.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.