Meaning:
"Get on the ball" means to become more alert, active, or efficient. It suggests someone needs to start working harder or more effectively, perhaps after being lazy or slow.
Examples:
* "We're behind schedule. Everyone needs to get on the ball if we want to finish on time."
* "The boss told the employees to get on the ball and start producing results."
Origin:
The exact origin is uncertain, but it likely comes from a time when baseball was popular. A player who was "on the ball" was alert and ready to react quickly.
Similar expressions:
* Get with the program
* Get your act together
* Step up your game