From Wiktionary, the free dictionary
night air (countable and uncountable, plural night airs)
- (obsolete) A miasma, or noxious atmosphere.
- Used other than figuratively or idiomatically: see night, air.
1950 January, David L. Smith, “A Runaway at Beattock”, in Railway Magazine, page 53:The night air may have sobered him a bit by the time they got back to Beattock.
