In what region of the United States is the expression Uff da popular among Scandinavian Americans?
Uff da:  Of Norwegian origin, the phrase was adopted by Scandinavian Americans in the Upper Midwest and Pacific Northwest region of the United States during the 19th century. Scandinavian Americans: Scandinavian Americans or Nordic Americans are Americans of Scandinavian (in the broad sense), or part-Scandinavian ancestry, defined in this article to include Danish Americans (estimate: 1,453,897), Faroese Americans (no estimates), Finnish Americans (estimate: 677,272), Greenlandic Americans (estimate: 352), Icelandic Americans (estimate: 51,234), Norwegian Americans (estimate: 4,602,337), Sami Americans (estimate: 30,000), Swedish Americans (estimate: 4,293,208).
Upper Midwest and Pacific Northwest