Proper noun
Wolverine State
(informal) A nickname for Michigan.
For example, the US state of Michigan is, by tradition, known as "the Wolverine State", and the University of Michigan takes the animal as their mascot. Source: Internet
Willis F. Dunbar and George S. May, Michigan: A History of the Wolverine State (Grand Rapids: Eerdman's, 1995), 359. The school started with four faculty members and twenty-three students. Source: Internet