Fukkireta

Fukkireta (吹っ切れた) is a series of dance videos featuring animated characters with their hands on their hips and shaking side to side with cute background music. “Fukkireta” is the past simple & present perfect simple tense of “Fukkiru”. The literal translation is to blow out or break through but is figuratively interpreted as a colloquial expression equivalent to “getting rid of a thorn in the eye” or to simply “blow off one’s worries” in Japanese. The original videos were posted on Nico Nico Douga and quickly spread across YouTube in May 2010.

A large number of these covers are parody character imitations and can be found under the tag 声真似に吹っ切れたシーリズ (Koemane ni Fukkireta Shi-rizu, lit. Imitation Fukkireta Series) on Nico Nico Douga.

For a more in depth information please vist this article.