There is a dance that is very popular recently. One of the movements is to squat sideways and swing your arms back and forth. What kind of dance is this?

This dance is called the hand-waving dance.

Floss Dance is often translated as "floss dance" or "floss dance", but it is more often not translated. Among them, "floss dance" is a more literal translation. Dancers need to clench their fists and let their hands swing by their sides, from back to front, and from front to back. The repetition of such movements makes this type of dance ideally suited to certain repetitive dance music.

The origins of this type of dance are not strictly formal. Backpack Kid, a boy born in the 2000s, is considered the founder of Floss Dance. In 2017, Katy Perry's performance on a variety show was stolen by Backpack Kid's dance performance.

Extended information

The English Wikipedia even thinks that the music style of Floss Dance must be Pop Music, which is biased. One of the great features of Floss Dance is that it is very repetitive, sometimes with only one movement. Trap Rap/Melodic Rap/Pop are not music that emphasizes repetition, so it is difficult to achieve synchronization.