An exciting, intense, or destructive event or performance that is memorable and impressive, often used in sports.
From barn (the building) plus burner, likely referencing the threat of setting a barn on fire as an act of destruction during the Civil War era 'Barn Burner' political conflicts in New York.
The term comes from the 1850s-60s 'Barn Burner' political faction in New York that was so radical they were accused of being willing to 'burn down the barn' (destroy everything) for their cause!
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