To avoid any language barriers here is a list of commonly used words and phrases:
Pronunciation: Uff da
Definition: Definition is dependent on situation. It could be used positively or negatively; in situations of surprise or exasperation.
Pa: Ma made rhubarb pie for Sunday supper! Uff da!
Ma: Your father used my good kitchen knife to clean his geese. Uff da.
Teacher: Little Sven passed the second grade this year! Uff da!
Uncle Clarence: That old Farmall is overheatin’ again. Uff da.
Definition: A form of acknowledgemement or agreement
Lars: Beans are lookin’ good this year.