From Wiktionary, the free dictionary
swingiest
- superlative form of swingy: most swingy
2018 July 25, John Walters, “Beyond the Border”, in Seven Days VT[1], Burlington, VT:NH-1, from which U.S. Rep. Carol Shea-Porter (D-N.H.) is retiring, is "one of the swingiest seats in the country," Smith said.
