Ring up curtain is a phrase that can be used to describe the action of pulling up a curtain using rings or hooks. There are several synonyms for this phrase, such as pulling up, raising up, hoisting up, or lifting up the curtain. All of these synonyms convey the same idea of taking a curtain that is hanging down and moving it upward so that it is out of the way. The phrase "ring up curtain" is often used in the context of dressing up a window or a stage, but one can use any of its synonyms to describe the same action.