trick top; spinning top for tricks
A top designed for performing tricks, often used in traditional Japanese spinning-top performances.
He is a master who skillfully manipulates trick tops.
祭りで曲独楽の妙技が披露された。
Amazing trick-top skills were demonstrated at the festival.
Compound of 曲 (きょく, 'trick' or 'performance') and 独楽 (こま, 'spinning top'). The exact historical derivation is uncertain, but the term clearly describes a top used for trick performances.