March Madness is the long-running nickname for the NCAA Division I basketball tournament, the single-elimination championship played each spring in the United States. Its reputation for upsets, buzzer beaters and unexpected runs made the name shorthand online for any chaotic, high-stakes bracket. Clips tagged with the phrase are shared every March across sports edits, group chats and prediction videos, resurfacing as soon as brackets open and staying in rotation through the Final Four and championship game.