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)
Appears to have its most common usage in Canada based on the above citations, and based on my own observations.