The phrase "sex up" is often used to describe the act of making something more sexually appealing or provocative. There are many synonyms for this phrase that can be used to achieve the same effect or to describe the same act. Some of these synonyms include: spice up, glamorize, titillate, seduce, arouse, entice, electrify, excite, stimulate, and tantalize. Depending on the context of the conversation, some of these synonyms may be more appropriate than others. However, no matter which synonym is used, the intention is to make something more sexually enticing and alluring.