record breaker
/ˈrɛkərd ˌbreɪkər/
noun
- A person or thing that achieves a new best performance or surpasses a previous highest achievement.
- This car is a record-breaker for fuel efficiency in its class.
- The young swimmer became a record-breaker at the national championships.
- She is a record-breaker in sales, having sold more units than anyone in company history.