Bishop73

Answer: The tune is FSU's "Massacre War Chant." There's a history of how it all came about (which the Atlanta Braves adopted), but that's the music that usually accompanies the "Tomahawk Chop." It's also known as just "War Chant", but I think "War Chant" is a slightly altered version.

Bishop73

Answer: They're imitating a Native American chant in the style of the Atlanta Braves, from whom they also take the chop.