Souping up is often used to describe the process of enhancing or modifying something to make it better. However, there are several antonyms for the term souping up that imply either reducing or leaving something as it is. Some of these antonyms include downsizing, simplifying, streamlining, minimizing, and scaling back. Downsizing, for instance, means reducing the size or amount of something. Simplifying implies making something less complicated or easier to use. Streamlining connotes optimizing a process or system for greater efficiency. Minimizing means reducing the impact or importance of something while scaling back suggests reducing or lowering the level of something. So, while souping up means enhancing or upgrading, its antonyms convey the opposite notion.