the ball is in someone's court
the ball is in (one's) court
One has the responsibility for further action, especially after someone else previously held responsibility. The phrase originated in tennis. Well, they invited you, so the ball is in your court now. Do you want to go out with them or not?
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
the ball is in someone's courtit is that particular person's turn to act next.
This expression is a metaphor from tennis or a similar ball game where different players use particular areas of a marked court.
Farlex Partner Idioms Dictionary © Farlex 2017
the ball is in someone’s court
phr. to be someone else’s move, play, or turn. I can’t do anything as long as the ball is in John’s court.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.