hokey Dinah other. an exclamation of surprise or marvel. Etymological Note: Perhaps a form of the slightly more common holy Dinah, though the Oxford English Dictionary has an entry for hokey, hoaky, defined as “a petty oath, or asservation.” Citations show a common form to be by the hokey which dates at least as far back as 1825. (source: Double-Tongued Dictionary)
Further reading
Ophelia in Johnson City, Tennessee, wonders about the exclamation her great-grandmother often used when something surprised her: Cat bristle! That may be her own version of a minced oath, although it fits with the idea of how a cat’s tail might look...
Quiz Guy John Chaneski’s puzzle this week involves pig Latin, a.k.a. Ig-pay Atin-lay. One of two answers to each clue is a regular English word, and the other is its pig Latin version. For example, what regular English word and its pig Latin...
Appears to have its most common usage in Canada based on the above citations, and based on my own observations.