big dance n. an important event, esp. when the culmination of long preparation or a series of smaller events; (hence) in sports, a tournament or championship game. Editorial Note: Usually constructed with the definite article: the big dance. (source: Double-Tongued Dictionary)
Further reading
Understanding the varieties of conversational styles can mean the difference between feeling you’re understood and being insulted. “High-involvement” speakers interrupt or talk along with someone else to signal their enthusiasm...