{v. phr.} 1. To begin play in a ball game. * /When the umpire calls "Play ball," the game begins./ 2. {informal} To join in an effort with others; cooperate. * /To get along during Prohibition, many men felt that they had to play ball with gangsters./ * /A is often good business to play ball with a political machine./
PLAY BALL
Meaning of PLAY BALL in English
Slang English vocab. Английский сленговый словарь. 2012