Walk out: Leave abruptly, often in protest or anger or as an expression of disapproval. 1. You can't walk out on your wife and children. 2. Just think; tomorrow we shall walk out of this place and leave it all behind us forever. 3. We're so short-staffed. I can't just walk out. 4. You can't walk out on the contract, or you could be taken to court. 5. I never walk out on a job half done. Tear down: tear down (dismantle something) to make flat with the ground 1. They're going to tear down the old hospital and build a new one. 2. They tried to tear down the reputation of the novelist. 3. It’s not difficult to tear down a groundless argument. Look up: seek information from. 1. Look up the trains to Beijing in the timetable. 2. They all look up to their teacher. 3. Occasionally Alice would look up from her books. Clean up: 1. put (things or places) in order 2. make a big profit; often in a short period of time 3. dispose of 4. make oneself clean, presentable or neat. 1. The party needs to clean up its somewhat tarnished image. 2. Drastic measures are needed to clean up the profession. 3. Could you please clean up the living room? 4. The mayor outlined his plan to clean up the town's image.