peasouper
/ˈpiːˌsuːpər/
noun
- A very thick, dense fog, especially one that is yellow or gray due to pollution (historically common in London).
- In old detective stories, a peasouper often sets the mood for a mysterious crime.
- The city was blanketed by a peasouper so thick you could barely see your hand in front of your face.
- The peasouper caused many accidents as drivers struggled to see the road.