thumb|left|Fast Hasapikos in the atrium of the [[Zappeion on March 3, 1926.]]
The hasapiko ( ; , ; , from Ottoman Turkish قصاب (kassâb) + -ικο (-iko)) is a Greek folk dance from Istanbul. The dance originated in the Middle Ages as a battle mime with swords performed by the Greek butchers' guild, which adopted it from the military of the Byzantine era. During the Byzantine era in Constantinople, it was called the (),
also meaning 'butcher's dance'. Some Greeks, however, reserve the latter term only for the fast version of the dance.
The slow version of the dance is called the (; ) and generally employs a meter. The fast version of the dance—variously called ( or the ()—uses a meter.