Wiktionary
hopak
n. A Ukrainian national dance in 2/4 time.
Wikipedia
Hopak
Hopak (, ), also referred to as Gopak or Cossack dance, is a Ukrainian dance. It is performed most often as a solitary concert dance by amateur and professional Ukrainian dance ensembles, as well as other performers of folk dances. It has also been incorporated into larger artistic opuses such as operas and ballets.
The Hopak is often popularly referred to as the " National Dance of Ukraine". There are similar folkloric dance tunes known as Sirmpa in Leros Greece.
Usage examples of "hopak".
To my ears, which expected that name to be Korean, it sounded like Hopak Kay, which means Large Hairy Dog.