하지 마 / 그러지 마 / 그만해 => Stop it.
하지 마 can mean what you said by itself when the unwanted action is obvious.
하다 often stands in for more specific actions, so one doesn't always need to specify the action.
You can also say 그러지 마 (= 그렇게 하지 마 = Don't act/behave like that), or 그만해 (그만하다 = stop doing something).
All three are commonly used, especially by kids and youngsters or between close friends.