Grey Duck

A sometimes derogatory slang term for someone either born or raised in Minnesota, Eastern South and North Dakota and Western Wisconsin that is sometimes also used as a badge of honor by said people. Derived from an alternate version of the children's game "duck, duck goose" played almost exclusively in the afore mentioned region of the United States. Supposedly, saying "grey duck" instead of "goose" allows for psych-out plays where you could say "greeen duck" or "grrrravel duck" or some such nonsense.
Alternate spelling: Gray Duck

Derives from the The game “Duck duck Grey duck” is a badge of honor for all Minnesota, North Dakota and western Wisconsin.