The Korean word 박수쳐 (pronounced: bahk soo chyo) means "Clap your hands". It can also mean: applause, clap, etc. You can hear this word in South Korean girl pop band: 2NE1's song: Clap Your Hands.
Kpop band: yeorobun, urin 2NE1! BAK SU CHYEO!!!!
audience: *applauds loudly*