This idiom, "The ball is in your court",  is used to indicate that it's now someone else's move or turn to take action or make a decision. It's often used in situations where one person has done all they can, and now it's time for the other person to do something.

Examples: 

- After I submitted my job application, the recruiter said, "The ball is in our court now. We will review your application and get back to you."

- During a negotiation, one party might say to the other, "We've made our offer, so the ball is in your court."

- After sending my friend a text message, I thought to myself, "The ball is in her court now. I'll wait for her to reply."

- During a tennis match, after a good serve, the player might think, "The ball is in his court now. Let's see how he returns it."

- After proposing a business idea to my boss, I said, "The ball is in your court now. It's up to you whether we proceed with this project or not."

- In a legal dispute, a lawyer might say to the opposing counsel, "We've presented our case. The ball is in your court now."

- After asking someone on a date, you might think, "The ball is in their court now. I'll wait for them to respond."

- During a political debate, a candidate might say to their opponent, "I've stated my position on the issue. The ball is in your court now."

- After submitting a college application, a student might say, "The ball is in the college's court now. I'll wait for their decision."

- In a negotiation, after making an offer, a seller might say to the buyer, "The ball is in your court now. It's your turn to make a counteroffer."

- After sending a manuscript to a publisher, an author might say, "The ball is in the publisher's court now. I'll wait for their feedback."

- During a game of chess, after making a move, a player might say to their opponent, "The ball is in your court now. It's your turn to move."

The Tennis Origins of "The Ball is in Your Court"

The familiar phrase "The ball is in your court" actually started on the tennis court! Back in the 1800s, it was clear whose turn it was: whoever had the ball on their side needed to hit it back. This simple idea became a handy metaphor for responsibility and action.

By the 1960s, the phrase wasn't just for sports anymore. People started using it in everyday life to say: "It's up to you now! Your turn to make a move!" The original image of the ball being hit back and forth stayed with the phrase, even though it wasn't always about a literal ball and court.

Here's a more concise version:
"The ball is in your court" originated in tennis, symbolizing the shift in responsibility when the ball lands on someone's side. By the 1960s, it became a common phrase for indicating whose turn it is to act.