one-up (someone) ÀǹÌ: ÇÑ ¼ö À§·Î ³ª¿À´Ù, ÇÑ ¼ö ¾Õ¼´Ù; [±¸¾î] 1Á¡Â÷·Î ¾Õ¼´Ù ¿¹½Ã: Why do you keep trying to one-up me? Two of my friends who are now two of my closest friends in recent years, used to one up me all of the time. You'll find ways to one up them.