One-upping is an act of trying to outdo someone by doing something better or more impressive, often in a competitive and boastful way. There are various words that can be used as synonyms for one-upping, such as outdoing, surpassing, excelling, exceeding, overshadowing, and eclipsing. Each of these terms conveys a sense of superiority over someone else, often with the intention of impressing others or gaining an advantage. While one-upping can be seen as a negative behaviour, when used in a positive and constructive manner, it can motivate individuals to achieve their best and strive for excellence.