Oneupmanship

[Greta]

An obsession with the lives of others, combined with an extreme inferiority complex, resulting in a mental disorder that requires the sufferer (the Oneupman) to constantly feel the need to prove his or her self to anyone who will pay attention.
The boasts and claims of the Oneupman are actually a cry for help from an unconfident person who believes they are great simply for completing ordinary tasks faster than anyone else, possessing a higher number of certain items than anyone else, or for doing anything a higher number of times than anyone else. Sadly, the Oneupman is still stuck at the my dad is stronger than yours stage of mental development.
The Oneupman never chooses a specialized activity to compete with, since they have very little special knowledge and simple accomplishments appeal to them most, such as driving faster than you, eating more than you, and guessing how a movie ends before it ends. It should be noted that being the best is not the focus, the Oneupman is only interested in being better than YOU. They need others to compete with and prove themselves against, since they cant feel good unless someone feels bad.
Tellingly, the Oneupman will only compete with people they know, since competing with strangers whose skills they arent familiar with may expose their weakness, which is the greatest fear of the Oneupman.