It was a whirlwind of activity.

Meaning

A period of intense and fast-paced events.

Examples

• John: How was the conference?
• Alice: Exhausting! <b>It was a whirlwind of activity</b>.
• John: I can imagine. So many presentations?
• Alice: Yes, and networking events too! Honestly, <b>it was a whirlwind of activity</b> from morning till night.