A shunter is a person whose job is to move train carriages around in a train yard.
Shunters are important for making sure trains go where they need to go, but it can be a tough and physical job.
Examples:
The shunter moves the train cars around.
The shunter works in the train yard.
The shunter's job is to make sure the trains are in the right place.
The shunter has a hard job, but it's important.
The shunter can move the train cars with just their hands!
The shunter is like a traffic director for trains.