“Paging the Boo Hoo girl”
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Actually that’s a snip from a longer video, the girl is doing what, in Korea, is called “aegyo” - i.e. “being/acting cute”. The crying movements are called “buing buing”.
An example from Korean TV:
https://www.youtube.com/watch?v=aeSeB6mzMoE
That’s the guy from “W”.
I fell in love with Boo Hoo Girl LOL! Truly gorgeous.