the lull before the storm
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Related to the lull before the storm: kick up a storm
lull before the storm
The period of inactivity before something chaotic begins. Oh, this is the lull before the storm—the dinner rush will turn this place into a mad house.
lull before the stormand calm before the storm
a quiet period just before a period of great activity or excitement. (Literal in reference to weather.) It was very quiet in the cafeteria just before the students came in for lunch. It was the lull before the storm. In the brief calm before the storm, the clerks prepared themselves for the doors to open and bring in thousands of shoppers.