Wikipedia
Kopanitsa (called in some regions Gankino) is the name for a family of lively folk dances from western Bulgaria written in meter, and also sometimes for the accompanying music. Some dancers count the steps in terms of "quick" and "slow" beats, the pattern being quick-quick-slow-quick-quick (counted as 2-2-3-2-2). The name comes from the verb kopam, which means "to dig" or "to hoe", so the name is sometimes translated as "little digging dance".
Kopanitsas and gankinos are line dances done with dancers in a curved line facing in, either holding hands with arms down or (in kopanitsas) holding the belts of the neighboring dancers. Many of them are "called" dances, with several patterns of steps. Dancers repeat one pattern until the leader on the right end of the line calls another pattern.
The term kopanitsa seems to be especially used in the Shopluk region of western Bulgaria, which includes the towns of Sofia, Pernik, Radomir and Kyustendil. Some common names are Shopska kopanitsa, Graovska kopanitsa, and Divotinka kopanitsa (from the village of Divotino). There is even a village named Kopanitsa not far from the town of Pernik.
The term kopanitsa is also found in western Thrace and the Sredna Gora regions east of Sofia ( Ihtiman, Panagyurishte, Pazardzhik) and even as far east as Plovdiv. The term gankino (Ganka's dance) seems to be used mostly in northern Bulgaria (particularly in the western and central parts) and also refers to dances in . In western Thrace, dances in meter are often called Krivo (or Krivata), a term which means "crooked" or "uneven".
Dances in similar to kopanitsa or gankino can also be found in Macedonia (Sedenka, Pletenica, Skopsko, etc.) and Serbia (Kopačka) using other names. It is not the same as the Serbian Kopačka, which is actually a kopanitsa.