one-upmanship       
noun [ U ]  disapproving uk/ˌwʌnˈʌp.mən.ʃɪp/ us/ˌwʌnˈʌp.mən.ʃɪp/
 胜人一筹的本事
a situation in which someone does or says something in order to prove that they are better than someone else
  Officials complain of his habit of one-upmanship when arranging events with other ministers.
 The researchers discovered that moving among certain social groups involves participating in constant one-upmanship .
 - More examples
 - The public will soon get tired of this one-upmanship.
 - Behind the competition and one-upmanship that had always existed between them, there was solid friendship.
 - One-upmanship was the deciding factor when it came to how high they went.