sack dance
n.— «Barnett was criticized by television announcers for doing his samurai sack dance with the Packers trailing Philadelphia by 35 points.» —“Barnett’s Antics Annoy Sherman” by Jason Wilde in Green Bay Capital Times & Wisconsin State Journal Dec. 14, 2004. (source: Double-Tongued Dictionary)
Further reading
A listener in Colby, Wisconsin, says that growing up, she called a drink with ice cream in root beer a black cow. But when she moved to Wisconsin, she found that the locals called the same beverage a root beer float. The era of drugstore fountains...
Matt in Beloit, Wisconsin, reports that when he was in high school back in the 1990s, he and his friends used the word biscuit in phrases like I feel like a biscuit or I bet you feel like a biscuit now, the idea being that someone said something...