"청이 거동봐라" => "청이 거동(을) 봐라". "Look at how Chung moves" / "Look at how Chung conducts him/herself". It appears "청" is the name of a person. "이" is a common suffix when you refer to someone's name in Korean. 거동 can be "movement" or "behavior / conduct". The phrase is a bit too short for one to be sure about the meaning without the context, but this is my best guess.

Look at 청's action/moving/walking