The idiom "get the ball rolling" means to start something, to initiate an action or a process. It is often used when a group of people are trying to accomplish a task or achieve a goal, but no one is taking the first step.
For example, imagine you are in a meeting with your colleagues to plan an event. Everyone is sitting around the table, but no one is suggesting any ideas or making any decisions. In this situation, you could say, "Let's get the ball rolling and start brainstorming some ideas."
Another example could be when you are starting a new project at work, and you need to motivate your team to begin working. You could say, "We need to get the ball rolling on this project, so let's start by setting some goals and deadlines."
In short, "get the ball rolling" means to take the first step towards starting something. It is a useful idiom to use when you want to encourage people to start working or to initiate a process.
• Let's get the ball rolling and start cleaning the house.
• The meeting won't start until we get the ball rolling and introduce ourselves.
• The only way to make progress is to get the ball rolling and take action.
• It's time to get the ball rolling on finding a new job.
• We need to get the ball rolling on this project if we want to finish it on time.
• We need to get the ball rolling on planning our vacation.