/naɪtˈwɒtʃmən/ (say nuyt'wochmuhn)

noun (plural nightwatchmen)
1. a man employed to guard property, etc., at night.
2. Cricket Colloquial a person who usually bats in the lower order, who is sent in to bat late in the afternoon when the batting-side captain wishes to preserve the better players for the next day's play.

Australian English dictionary. 2014.