“Oofta” was once introduced to the USA within the overdue 19th and early 20th centuries, by way of the Norwegian immigrants, who’ve already been exclaiming Uff Da for many years.
The word itself isn’t expressing all that a lot: Uff or Oof is an emotional exhalation, whilst Da is the Norwegian phrase for “then”.
“Oofta” began to shape from the unique expression within the early many years of the 1900’s, when the tens of millions of Norwegian immigrants began integrating with the locals of the Midwest, forming their very own lingo, which incorporated the titular word.