It's pretty much a dance(?) that became big on YouTube, where for about 15 seconds there'll be someone just dancing/having a siezure, then there's a bit of a climax to the song, and everyone loses their minds with various props/costumes/lack of clothes (sometimes)
It's an extremely annoying song in a different language. What's awesome about it, is that people dress up in something totally random, unexpected. Then they just dance in the strangest of ways. Search it on Youtube. It's pure hilarity.