[noun] [U] - a condition which can exist in a small, crowded place when the air is not pure, esp. because of smoke or heatThere was such a fug in the train carriage, I was very relieved when we reached the station.We smiled at each other through a grey fug of cigarette smoke.
FUG
Meaning of FUG in English
Cambridge English vocab. Кембриджский английский словарь. 2012