A railway locomotive used for shunting; a switcher(noun)
A person who carries out shunting operations(noun)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "shunter" in a sentence
"He was shunting locos in the yard at Wembley one night accompanied by the shunter."
"Rachel did this by 'herself' with the shunter watching - when 'she' had finished 'she' said to the shunter testily "If you had been a gentleman you would have done that for me." to which the shunter said "And if you had been a lady I would have done.""
"The poor shunter - he's the one who has to go home and explain the love-bites to his missus."